131807887 has 2 divisors, whose sum is σ = 131807888. Its totient is φ = 131807886.

The previous prime is 131807869. The next prime is 131807891. The reversal of 131807887 is 788708131.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (788708131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131807887 - 2⁷ = 131807759 is a prime.

It is equal to p_7474975 and since 131807887 and 7474975 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131807287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65903943 + 65903944.

It is an arithmetic number, because the mean of its divisors is an integer number (65903944).

Almost surely, 2^131807887 is an apocalyptic number.

131807887 is a deficient number, since it is larger than the sum of its proper divisors (1).

131807887 is an equidigital number, since it uses as much as digits as its factorization.

131807887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75264, while the sum is 43.

The square root of 131807887 is about 11480.7616036568. The cubic root of 131807887 is about 508.9172041855.

The spelling of 131807887 in words is "one hundred thirty-one million, eight hundred seven thousand, eight hundred eighty-seven".