72917427 has 16 divisors (see below), whose sum is σ = 106278912. Its totient is φ = 44101920.

The previous prime is 72917413. The next prime is 72917473. The reversal of 72917427 is 72471927.

It is not a de Polignac number, because 72917427 - 2⁸ = 72917171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72917827) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16398 + ... + 20364.

It is an arithmetic number, because the mean of its divisors is an integer number (6642432).

Almost surely, 2^72917427 is an apocalyptic number.

72917427 is a deficient number, since it is larger than the sum of its proper divisors (33361485).

72917427 is a wasteful number, since it uses less digits than its factorization.

72917427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4538.

The product of its digits is 49392, while the sum is 39.

The square root of 72917427 is about 8539.1701587449. The cubic root of 72917427 is about 417.7762800144.

The spelling of 72917427 in words is "seventy-two million, nine hundred seventeen thousand, four hundred twenty-seven".