72511983 has 8 divisors (see below), whose sum is σ = 107425200. Its totient is φ = 48341304.

The previous prime is 72511979. The next prime is 72511997. The reversal of 72511983 is 38911527.

It is not a de Polignac number, because 72511983 - 2² = 72511979 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72511913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1342788 + ... + 1342841.

It is an arithmetic number, because the mean of its divisors is an integer number (13428150).

Almost surely, 2^72511983 is an apocalyptic number.

72511983 is a deficient number, since it is larger than the sum of its proper divisors (34913217).

72511983 is a wasteful number, since it uses less digits than its factorization.

72511983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2685638 (or 2685632 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 72511983 is about 8515.3968198787. The cubic root of 72511983 is about 417.0005175709. Note that the first 3 decimals are identical.

The spelling of 72511983 in words is "seventy-two million, five hundred eleven thousand, nine hundred eighty-three".