72318965 has 4 divisors (see below), whose sum is σ = 86782764. Its totient is φ = 57855168.

The previous prime is 72318949. The next prime is 72318973. The reversal of 72318965 is 56981327.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27133681 + 45185284 = 5209^2 + 6722^2 .

It is a cyclic number.

It is not a de Polignac number, because 72318965 - 2⁴ = 72318949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7231892 + ... + 7231901.

It is an arithmetic number, because the mean of its divisors is an integer number (21695691).

Almost surely, 2^72318965 is an apocalyptic number.

It is an amenable number.

72318965 is a deficient number, since it is larger than the sum of its proper divisors (14463799).

72318965 is a wasteful number, since it uses less digits than its factorization.

72318965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14463798.

The product of its digits is 90720, while the sum is 41.

The square root of 72318965 is about 8504.0557970888. The cubic root of 72318965 is about 416.6301873841.

The spelling of 72318965 in words is "seventy-two million, three hundred eighteen thousand, nine hundred sixty-five".