131386408 has 16 divisors (see below), whose sum is σ = 253008180. Its totient is φ = 63917568.

The previous prime is 131386399. The next prime is 131386433. The reversal of 131386408 is 804683131.

It can be written as a sum of positive squares in 2 ways, for example, as 110208004 + 21178404 = 10498^2 + 4602^2 .

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 3 ways as a sum of consecutive naturals, for example, 221641 + ... + 222232.

Almost surely, 2^131386408 is an apocalyptic number.

It is an amenable number.

131386408 is a deficient number, since it is larger than the sum of its proper divisors (121621772).

131386408 is a wasteful number, since it uses less digits than its factorization.

131386408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443916 (or 443912 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 131386408 is about 11462.3910245638. The cubic root of 131386408 is about 508.3741740784.

The spelling of 131386408 in words is "one hundred thirty-one million, three hundred eighty-six thousand, four hundred eight".