131678931 has 8 divisors (see below), whose sum is σ = 178450384. Its totient is φ = 86346720.

The previous prime is 131678891. The next prime is 131678959. The reversal of 131678931 is 139876131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131678931 - 2⁷ = 131678803 is a prime.

It is a super-2 number, since 2×131678931² = 34678681738605522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131678931.

It is not an unprimeable number, because it can be changed into a prime (131678831) 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, 359596 + ... + 359961.

It is an arithmetic number, because the mean of its divisors is an integer number (22306298).

Almost surely, 2^131678931 is an apocalyptic number.

131678931 is a deficient number, since it is larger than the sum of its proper divisors (46771453).

131678931 is an equidigital number, since it uses as much as digits as its factorization.

131678931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719621.

The product of its digits is 27216, while the sum is 39.

The square root of 131678931 is about 11475.1440513834. The cubic root of 131678931 is about 508.7511813908.

The spelling of 131678931 in words is "one hundred thirty-one million, six hundred seventy-eight thousand, nine hundred thirty-one".