131608920 has 32 divisors (see below), whose sum is σ = 394827120. Its totient is φ = 35095680.

The previous prime is 131608909. The next prime is 131608927. The reversal of 131608920 is 29806131.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131608927) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 548251 + ... + 548490.

Almost surely, 2^131608920 is an apocalyptic number.

131608920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131608920 is an abundant number, since it is smaller than the sum of its proper divisors (263218200).

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

131608920 is a wasteful number, since it uses less digits than its factorization.

131608920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1096755 (or 1096751 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 131608920 is about 11472.0930958566. The cubic root of 131608920 is about 508.6610012002.

The spelling of 131608920 in words is "one hundred thirty-one million, six hundred eight thousand, nine hundred twenty".