131979930 has 16 divisors (see below), whose sum is σ = 316751904. Its totient is φ = 35194640.

The previous prime is 131979929. The next prime is 131979931. The reversal of 131979930 is 39979131.

It is an interprime number because it is at equal distance from previous prime (131979929) and next prime (131979931).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (131979931) 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, 2199636 + ... + 2199695.

It is an arithmetic number, because the mean of its divisors is an integer number (19796994).

Almost surely, 2^131979930 is an apocalyptic number.

131979930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131979930 is an abundant number, since it is smaller than the sum of its proper divisors (184771974).

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

131979930 is a wasteful number, since it uses less digits than its factorization.

131979930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4399341.

The product of its (nonzero) digits is 45927, while the sum is 42.

The square root of 131979930 is about 11488.2518252343. The cubic root of 131979930 is about 509.1385302836.

The spelling of 131979930 in words is "one hundred thirty-one million, nine hundred seventy-nine thousand, nine hundred thirty".