Definition:Perfect Digit-to-Digit Invariant/Examples

Examples of Perfect Digit-to-Digit Invariants

$1$ is a Perfect Digit-to-Digit Invariant

$1$ is a perfect digit-to-digit invariant:

$1 = 1^1$

$3435$ is a Perfect Digit-to-Digit Invariant

$3435$ is a perfect digit-to-digit invariant:

$3435 = 3^3 + 4^4 + 3^3 + 5^5$

$438 \, 579 \, 088$ is a Perfect Digit-to-Digit Invariant

$438 \, 579 \, 088$ is a perfect digit-to-digit invariant:

$438 \, 579 \, 088 = 4^4 + 3^3 + 8^8 + 5^5 + 7^7 + 9^9 + 0^0 + 8^8 + 8^8$