131690808 has 48 divisors (see below), whose sum is σ = 360687600. Its totient is φ = 43401600.

The previous prime is 131690803. The next prime is 131690831. The reversal of 131690808 is 808096131.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131690803) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3868 + ... + 16683.

It is an arithmetic number, because the mean of its divisors is an integer number (7514325).

Almost surely, 2^131690808 is an apocalyptic number.

131690808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

131690808 is an abundant number, since it is smaller than the sum of its proper divisors (228996792).

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

131690808 is a wasteful number, since it uses less digits than its factorization.

131690808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20652 (or 20645 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 131690808 is about 11475.6615495578. The cubic root of 131690808 is about 508.7664768171.

The spelling of 131690808 in words is "one hundred thirty-one million, six hundred ninety thousand, eight hundred eight".