131880649 has 4 divisors (see below), whose sum is σ = 133186500. Its totient is φ = 130574800.

The previous prime is 131880631. The next prime is 131880667. The reversal of 131880649 is 946088131.

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

It is an interprime number because it is at equal distance from previous prime (131880631) and next prime (131880667).

It can be written as a sum of positive squares in 2 ways, for example, as 111450249 + 20430400 = 10557^2 + 4520^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131880649 is a prime.

It is a super-2 number, since 2×131880649² = 34785011161322402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131883649) 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, 652774 + ... + 652975.

It is an arithmetic number, because the mean of its divisors is an integer number (33296625).

Almost surely, 2^131880649 is an apocalyptic number.

It is an amenable number.

131880649 is a deficient number, since it is larger than the sum of its proper divisors (1305851).

131880649 is a wasteful number, since it uses less digits than its factorization.

131880649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1305850.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 131880649 is about 11483.9300328764. The cubic root of 131880649 is about 509.0108329323.

The spelling of 131880649 in words is "one hundred thirty-one million, eight hundred eighty thousand, six hundred forty-nine".