131312990 has 16 divisors (see below), whose sum is σ = 248803920. Its totient is φ = 49760640.

The previous prime is 131312989. The next prime is 131313001. The reversal of 131312990 is 99213131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 345371 + ... + 345750.

It is an arithmetic number, because the mean of its divisors is an integer number (15550245).

Almost surely, 2^131312990 is an apocalyptic number.

131312990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131312990 is a deficient number, since it is larger than the sum of its proper divisors (117490930).

131312990 is a wasteful number, since it uses less digits than its factorization.

131312990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691147.

The product of its (nonzero) digits is 1458, while the sum is 29.

The square root of 131312990 is about 11459.1880166092. The cubic root of 131312990 is about 508.2794642071.

The spelling of 131312990 in words is "one hundred thirty-one million, three hundred twelve thousand, nine hundred ninety".