131908916 has 12 divisors (see below), whose sum is σ = 244419588. Its totient is φ = 62074752.

The previous prime is 131908913. The next prime is 131908921. The reversal of 131908916 is 619809131.

It can be written as a sum of positive squares in 2 ways, for example, as 81072016 + 50836900 = 9004^2 + 7130^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 131908916.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131908913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 969851 + ... + 969986.

It is an arithmetic number, because the mean of its divisors is an integer number (20368299).

Almost surely, 2^131908916 is an apocalyptic number.

It is an amenable number.

131908916 is a deficient number, since it is larger than the sum of its proper divisors (112510672).

131908916 is a wasteful number, since it uses less digits than its factorization.

131908916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1939858 (or 1939856 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 38.

The square root of 131908916 is about 11485.1606867296. The cubic root of 131908916 is about 509.0471970779.

The spelling of 131908916 in words is "one hundred thirty-one million, nine hundred eight thousand, nine hundred sixteen".