83657972 has 12 divisors (see below), whose sum is σ = 146597220. Its totient is φ = 41773056.

The previous prime is 83657911. The next prime is 83657989. The reversal of 83657972 is 27975638.

It can be written as a sum of positive squares in 2 ways, for example, as 39488656 + 44169316 = 6284^2 + 6646^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10523 + ... + 16674.

It is an arithmetic number, because the mean of its divisors is an integer number (12216435).

Almost surely, 2^83657972 is an apocalyptic number.

It is an amenable number.

83657972 is a deficient number, since it is larger than the sum of its proper divisors (62939248).

83657972 is a wasteful number, since it uses less digits than its factorization.

83657972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27970 (or 27968 counting only the distinct ones).

The product of its digits is 635040, while the sum is 47.

The square root of 83657972 is about 9146.4732000919. The cubic root of 83657972 is about 437.3566934177.

The spelling of 83657972 in words is "eighty-three million, six hundred fifty-seven thousand, nine hundred seventy-two".