131309994 has 16 divisors (see below), whose sum is σ = 263355840. Its totient is φ = 43647360.

The previous prime is 131309993. The next prime is 131310043. The reversal of 131309994 is 499903131.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (131309993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28327 + ... + 32634.

It is an arithmetic number, because the mean of its divisors is an integer number (16459740).

Almost surely, 2^131309994 is an apocalyptic number.

131309994 is an abundant number, since it is smaller than the sum of its proper divisors (132045846).

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

131309994 is a wasteful number, since it uses less digits than its factorization.

131309994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61325.

The product of its (nonzero) digits is 26244, while the sum is 39.

The square root of 131309994 is about 11459.0572910689. The cubic root of 131309994 is about 508.2755985909.

The spelling of 131309994 in words is "one hundred thirty-one million, three hundred nine thousand, nine hundred ninety-four".