72904859 has 4 divisors (see below), whose sum is σ = 73931760. Its totient is φ = 71877960.

The previous prime is 72904841. The next prime is 72904873. The reversal of 72904859 is 95840927.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72904859 - 2²⁰ = 71856283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72904829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 513344 + ... + 513485.

It is an arithmetic number, because the mean of its divisors is an integer number (18482940).

Almost surely, 2^72904859 is an apocalyptic number.

72904859 is a deficient number, since it is larger than the sum of its proper divisors (1026901).

72904859 is a wasteful number, since it uses less digits than its factorization.

72904859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1026900.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 72904859 is about 8538.4342241420. The cubic root of 72904859 is about 417.7522760865.

The spelling of 72904859 in words is "seventy-two million, nine hundred four thousand, eight hundred fifty-nine".