131169872 has 10 divisors (see below), whose sum is σ = 254141658. Its totient is φ = 65584928.

The previous prime is 131169833. The next prime is 131169877. The reversal of 131169872 is 278961131.

It can be written as a sum of positive squares in only one way, i.e., 111598096 + 19571776 = 10564^2 + 4424^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131169877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4099043 + ... + 4099074.

Almost surely, 2^131169872 is an apocalyptic number.

It is an amenable number.

131169872 is a deficient number, since it is larger than the sum of its proper divisors (122971786).

131169872 is an equidigital number, since it uses as much as digits as its factorization.

131169872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8198125 (or 8198119 counting only the distinct ones).

The product of its digits is 18144, while the sum is 38.

The square root of 131169872 is about 11452.9416308650. The cubic root of 131169872 is about 508.0947391867.

The spelling of 131169872 in words is "one hundred thirty-one million, one hundred sixty-nine thousand, eight hundred seventy-two".