72556937 has 4 divisors (see below), whose sum is σ = 72588816. Its totient is φ = 72525060.

The previous prime is 72556931. The next prime is 72556949. The reversal of 72556937 is 73965527.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72556937 - 2¹⁰ = 72555913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72556931) 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, 12239 + ... + 17172.

It is an arithmetic number, because the mean of its divisors is an integer number (18147204).

Almost surely, 2^72556937 is an apocalyptic number.

It is an amenable number.

72556937 is a deficient number, since it is larger than the sum of its proper divisors (31879).

72556937 is a wasteful number, since it uses less digits than its factorization.

72556937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31878.

The product of its digits is 396900, while the sum is 44.

The square root of 72556937 is about 8518.0359825490. The cubic root of 72556937 is about 417.0866733021.

The spelling of 72556937 in words is "seventy-two million, five hundred fifty-six thousand, nine hundred thirty-seven".