131690139 has 16 divisors (see below), whose sum is σ = 207144960. Its totient is φ = 72823680.

The previous prime is 131690137. The next prime is 131690147. The reversal of 131690139 is 931096131.

It is a happy number.

It is not a de Polignac number, because 131690139 - 2¹ = 131690137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131690137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100494 + ... + 101795.

It is an arithmetic number, because the mean of its divisors is an integer number (12946560).

Almost surely, 2^131690139 is an apocalyptic number.

131690139 is a deficient number, since it is larger than the sum of its proper divisors (75454821).

131690139 is a wasteful number, since it uses less digits than its factorization.

131690139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202330.

The product of its (nonzero) digits is 4374, while the sum is 33.

The square root of 131690139 is about 11475.6324008745. The cubic root of 131690139 is about 508.7656152906.

The spelling of 131690139 in words is "one hundred thirty-one million, six hundred ninety thousand, one hundred thirty-nine".