72312907 has 4 divisors (see below), whose sum is σ = 72330120. Its totient is φ = 72295696.

The previous prime is 72312871. The next prime is 72312913. The reversal of 72312907 is 70921327.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 72312907 - 2¹¹ = 72310859 is a prime.

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 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, 2319 + ... + 12247.

It is an arithmetic number, because the mean of its divisors is an integer number (18082530).

Almost surely, 2^72312907 is an apocalyptic number.

72312907 is a deficient number, since it is larger than the sum of its proper divisors (17213).

72312907 is an equidigital number, since it uses as much as digits as its factorization.

72312907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17212.

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 72312907 is about 8503.6996066418. The cubic root of 72312907 is about 416.6185536623.

The spelling of 72312907 in words is "seventy-two million, three hundred twelve thousand, nine hundred seven".