72807091 has 18 divisors (see below), whose sum is σ = 86236668. Its totient is φ = 61288920.

The previous prime is 72807067. The next prime is 72807109. The reversal of 72807091 is 19070827.

It is not a de Polignac number, because 72807091 - 2⁷ = 72806963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72807011) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 219796 + ... + 220126.

It is an arithmetic number, because the mean of its divisors is an integer number (4790926).

Almost surely, 2^72807091 is an apocalyptic number.

72807091 is a deficient number, since it is larger than the sum of its proper divisors (13429577).

72807091 is an equidigital number, since it uses as much as digits as its factorization.

72807091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479 (or 405 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 34.

The square root of 72807091 is about 8532.7071319717. The cubic root of 72807091 is about 417.5654523461.

The spelling of 72807091 in words is "seventy-two million, eight hundred seven thousand, ninety-one".