131389956 has 36 divisors (see below), whose sum is σ = 336336000. Its totient is φ = 43241328.

The previous prime is 131389933. The next prime is 131389967. The reversal of 131389956 is 659983131.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 20256 + ... + 25943.

Almost surely, 2^131389956 is an apocalyptic number.

It is an amenable number.

131389956 is an abundant number, since it is smaller than the sum of its proper divisors (204946044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131389956 is a wasteful number, since it uses less digits than its factorization.

131389956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46288 (or 46283 counting only the distinct ones).

The product of its digits is 174960, while the sum is 45.

The square root of 131389956 is about 11462.5457905301. The cubic root of 131389956 is about 508.3787501361.

The spelling of 131389956 in words is "one hundred thirty-one million, three hundred eighty-nine thousand, nine hundred fifty-six".