131387577 has 8 divisors (see below), whose sum is σ = 185488416. Its totient is φ = 82439232.

The previous prime is 131387573. The next prime is 131387587. The reversal of 131387577 is 775783131.

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

It is not a de Polignac number, because 131387577 - 2² = 131387573 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (131387573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1288063 + ... + 1288164.

It is an arithmetic number, because the mean of its divisors is an integer number (23186052).

Almost surely, 2^131387577 is an apocalyptic number.

131387577 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

131387577 is a deficient number, since it is larger than the sum of its proper divisors (54100839).

131387577 is a wasteful number, since it uses less digits than its factorization.

131387577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2576247.

The product of its digits is 123480, while the sum is 42.

The square root of 131387577 is about 11462.4420173015. The cubic root of 131387577 is about 508.3756818134.

The spelling of 131387577 in words is "one hundred thirty-one million, three hundred eighty-seven thousand, five hundred seventy-seven".