131973378 has 32 divisors (see below), whose sum is σ = 270732672. Its totient is φ = 42873600.

The previous prime is 131973343. The next prime is 131973389. The reversal of 131973378 is 873379131.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39763 + ... + 42953.

It is an arithmetic number, because the mean of its divisors is an integer number (8460396).

Almost surely, 2^131973378 is an apocalyptic number.

131973378 is an abundant number, since it is smaller than the sum of its proper divisors (138759294).

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

131973378 is a wasteful number, since it uses less digits than its factorization.

131973378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3370.

The product of its digits is 95256, while the sum is 42.

The square root of 131973378 is about 11487.9666608151. The cubic root of 131973378 is about 509.1301049348.

The spelling of 131973378 in words is "one hundred thirty-one million, nine hundred seventy-three thousand, three hundred seventy-eight".