72312969 has 4 divisors (see below), whose sum is σ = 96417296. Its totient is φ = 48208644.

The previous prime is 72312967. The next prime is 72312973. The reversal of 72312969 is 96921327.

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, and also an emirpimes, since its reverse is a distinct semiprime: 96921327 = 3 ⋅32307109.

It is not a de Polignac number, because 72312969 - 2¹ = 72312967 is a prime.

It is a super-2 number, since 2×72312969² = 10458330971189922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72312967) 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, 12052159 + ... + 12052164.

It is an arithmetic number, because the mean of its divisors is an integer number (24104324).

Almost surely, 2^72312969 is an apocalyptic number.

It is an amenable number.

72312969 is a deficient number, since it is larger than the sum of its proper divisors (24104327).

72312969 is a wasteful number, since it uses less digits than its factorization.

72312969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24104326.

The product of its digits is 40824, while the sum is 39.

The square root of 72312969 is about 8503.7032521132. The cubic root of 72312969 is about 416.6186727298.

The spelling of 72312969 in words is "seventy-two million, three hundred twelve thousand, nine hundred sixty-nine".