131690 has 16 divisors (see below), whose sum is σ = 255528. Its totient is φ = 48576.

The previous prime is 131687. The next prime is 131701. The reversal of 131690 is 96131.

It can be written as a sum of positive squares in 4 ways, for example, as 34969 + 96721 = 187^2 + 311^2 .

It is a super-2 number, since 2×131690² = 34684512200, which contains 22 as substring.

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, 377 + ... + 636.

2¹³¹⁶⁹⁰ is an apocalyptic number.

131690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131690 is a deficient number, since it is larger than the sum of its proper divisors (123838).

131690 is a wasteful number, since it uses less digits than its factorization.

131690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 131690 is about 362.8911682585. The cubic root of 131690 is about 50.8765436288.

The spelling of 131690 in words is "one hundred thirty-one thousand, six hundred ninety".