131976881 has 4 divisors (see below), whose sum is σ = 133144932. Its totient is φ = 130808832.

The previous prime is 131976863. The next prime is 131976931. The reversal of 131976881 is 188679131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35760400 + 96216481 = 5980^2 + 9809^2 .

It is a cyclic number.

It is not a de Polignac number, because 131976881 - 2¹⁴ = 131960497 is a prime.

It is a super-2 number, since 2×131976881² = 34835794236976322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (131976811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 583856 + ... + 584081.

It is an arithmetic number, because the mean of its divisors is an integer number (33286233).

Almost surely, 2^131976881 is an apocalyptic number.

It is an amenable number.

131976881 is a deficient number, since it is larger than the sum of its proper divisors (1168051).

131976881 is a wasteful number, since it uses less digits than its factorization.

131976881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1168050.

The product of its digits is 72576, while the sum is 44.

The square root of 131976881 is about 11488.1191236860. The cubic root of 131976881 is about 509.1346095478.

The spelling of 131976881 in words is "one hundred thirty-one million, nine hundred seventy-six thousand, eight hundred eighty-one".