131977938 has 8 divisors (see below), whose sum is σ = 263955888. Its totient is φ = 43992644.

The previous prime is 131977921. The next prime is 131977949. The reversal of 131977938 is 839779131.

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

131977938 is an admirable number.

It is a super-2 number, since 2×131977938² = 34836352237463688, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 10998156 + ... + 10998167.

It is an arithmetic number, because the mean of its divisors is an integer number (32994486).

Almost surely, 2^131977938 is an apocalyptic number.

131977938 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

131977938 is a wasteful number, since it uses less digits than its factorization.

131977938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21996328.

The product of its digits is 285768, while the sum is 48.

The square root of 131977938 is about 11488.1651276433. The cubic root of 131977938 is about 509.1359687602.

The spelling of 131977938 in words is "one hundred thirty-one million, nine hundred seventy-seven thousand, nine hundred thirty-eight".