72606917 has 4 divisors (see below), whose sum is σ = 72720480. Its totient is φ = 72493356.

The previous prime is 72606901. The next prime is 72606953. The reversal of 72606917 is 71960627.

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 72606917 - 2⁴ = 72606901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72606977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55817 + ... + 57102.

It is an arithmetic number, because the mean of its divisors is an integer number (18180120).

Almost surely, 2^72606917 is an apocalyptic number.

It is an amenable number.

72606917 is a deficient number, since it is larger than the sum of its proper divisors (113563).

72606917 is a wasteful number, since it uses less digits than its factorization.

72606917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113562.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 72606917 is about 8520.9692523797. The cubic root of 72606917 is about 417.1824197514.

The spelling of 72606917 in words is "seventy-two million, six hundred six thousand, nine hundred seventeen".