131320887 has 4 divisors (see below), whose sum is σ = 175094520. Its totient is φ = 87547256.

The previous prime is 131320873. The next prime is 131320901. The reversal of 131320887 is 788023131.

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 (131320873) and next prime (131320901).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131320887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131320817) by changing a digit.

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, 21886812 + ... + 21886817.

It is an arithmetic number, because the mean of its divisors is an integer number (43773630).

Almost surely, 2^131320887 is an apocalyptic number.

131320887 is a deficient number, since it is larger than the sum of its proper divisors (43773633).

131320887 is an equidigital number, since it uses as much as digits as its factorization.

131320887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43773632.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 131320887 is about 11459.5325820908. The cubic root of 131320887 is about 508.2896531012.

The spelling of 131320887 in words is "one hundred thirty-one million, three hundred twenty thousand, eight hundred eighty-seven".