72322957 has 4 divisors (see below), whose sum is σ = 82654816. Its totient is φ = 61991100.

The previous prime is 72322891. The next prime is 72322973. The reversal of 72322957 is 75922327.

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 72322957 - 2¹⁵ = 72290189 is a prime.

It is a super-2 number, since 2×72322957² = 10461220218447698, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72322057) 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, 5165919 + ... + 5165932.

It is an arithmetic number, because the mean of its divisors is an integer number (20663704).

Almost surely, 2^72322957 is an apocalyptic number.

It is an amenable number.

72322957 is a deficient number, since it is larger than the sum of its proper divisors (10331859).

72322957 is a wasteful number, since it uses less digits than its factorization.

72322957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10331858.

The product of its digits is 52920, while the sum is 37.

The square root of 72322957 is about 8504.2905053861. The cubic root of 72322957 is about 416.6378532253.

The spelling of 72322957 in words is "seventy-two million, three hundred twenty-two thousand, nine hundred fifty-seven".