131976978 has 16 divisors (see below), whose sum is σ = 301661760. Its totient is φ = 37707696.

The previous prime is 131976947. The next prime is 131976979. The reversal of 131976978 is 879679131.

It is a self number, because there is not a number n which added to its sum of digits gives 131976978.

It is not an unprimeable number, because it can be changed into a prime (131976979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1571113 + ... + 1571196.

It is an arithmetic number, because the mean of its divisors is an integer number (18853860).

Almost surely, 2^131976978 is an apocalyptic number.

131976978 is an abundant number, since it is smaller than the sum of its proper divisors (169684782).

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

131976978 is a wasteful number, since it uses less digits than its factorization.

131976978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3142321.

The product of its digits is 571536, while the sum is 51.

The square root of 131976978 is about 11488.1233454381. The cubic root of 131976978 is about 509.1347342818.

The spelling of 131976978 in words is "one hundred thirty-one million, nine hundred seventy-six thousand, nine hundred seventy-eight".