72816479 has 2 divisors, whose sum is σ = 72816480. Its totient is φ = 72816478.

The previous prime is 72816467. The next prime is 72816511. The reversal of 72816479 is 97461827.

It is a weak prime.

It is an emirp because it is prime and its reverse (97461827) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72816479 is a prime.

It is a super-2 number, since 2×72816479² = 10604479227914882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72816439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36408239 + 36408240.

It is an arithmetic number, because the mean of its divisors is an integer number (36408240).

Almost surely, 2^72816479 is an apocalyptic number.

72816479 is a deficient number, since it is larger than the sum of its proper divisors (1).

72816479 is an equidigital number, since it uses as much as digits as its factorization.

72816479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 44.

The square root of 72816479 is about 8533.2572327336. The cubic root of 72816479 is about 417.5833990229.

The spelling of 72816479 in words is "seventy-two million, eight hundred sixteen thousand, four hundred seventy-nine".