72904711 has 4 divisors (see below), whose sum is σ = 79532424. Its totient is φ = 66277000.

The previous prime is 72904697. The next prime is 72904723. The reversal of 72904711 is 11740927.

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 72904711 - 2⁷ = 72904583 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72904781) 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, 3313840 + ... + 3313861.

It is an arithmetic number, because the mean of its divisors is an integer number (19883106).

Almost surely, 2^72904711 is an apocalyptic number.

72904711 is the 3819-th centered decagonal number.

72904711 is a deficient number, since it is larger than the sum of its proper divisors (6627713).

72904711 is a wasteful number, since it uses less digits than its factorization.

72904711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6627712.

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 72904711 is about 8538.4255574432. The cubic root of 72904711 is about 417.7519934013.

The spelling of 72904711 in words is "seventy-two million, nine hundred four thousand, seven hundred eleven".