131129690 has 32 divisors (see below), whose sum is σ = 245583360. Its totient is φ = 50356800.

The previous prime is 131129689. The next prime is 131129707. The reversal of 131129690 is 96921131.

It is a super-2 number, since 2×131129690² = 34389991198992200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38996 + ... + 42224.

It is an arithmetic number, because the mean of its divisors is an integer number (7674480).

Almost surely, 2^131129690 is an apocalyptic number.

131129690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131129690 is a deficient number, since it is larger than the sum of its proper divisors (114453670).

131129690 is a wasteful number, since it uses less digits than its factorization.

131129690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3398.

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 131129690 is about 11451.1872746890. The cubic root of 131129690 is about 508.0428513876.

The spelling of 131129690 in words is "one hundred thirty-one million, one hundred twenty-nine thousand, six hundred ninety".