131920956 has 36 divisors (see below), whose sum is σ = 336536200. Its totient is φ = 43568928.

The previous prime is 131920907. The next prime is 131920961. The reversal of 131920956 is 659029131.

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

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 131920956.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12886 + ... + 20733.

Almost surely, 2^131920956 is an apocalyptic number.

It is an amenable number.

131920956 is an abundant number, since it is smaller than the sum of its proper divisors (204615244).

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

131920956 is a wasteful number, since it uses less digits than its factorization.

131920956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33738 (or 33733 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The square root of 131920956 is about 11485.6848293865. The cubic root of 131920956 is about 509.0626843853.

The spelling of 131920956 in words is "one hundred thirty-one million, nine hundred twenty thousand, nine hundred fifty-six".