131185687 has 2 divisors, whose sum is σ = 131185688. Its totient is φ = 131185686.

The previous prime is 131185673. The next prime is 131185697. The reversal of 131185687 is 786581131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131185687 - 2¹⁵ = 131152919 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131185667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65592843 + 65592844.

It is an arithmetic number, because the mean of its divisors is an integer number (65592844).

Almost surely, 2^131185687 is an apocalyptic number.

131185687 is a deficient number, since it is larger than the sum of its proper divisors (1).

131185687 is an equidigital number, since it uses as much as digits as its factorization.

131185687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 40.

The square root of 131185687 is about 11453.6320440287. The cubic root of 131185687 is about 508.1151584981.

The spelling of 131185687 in words is "one hundred thirty-one million, one hundred eighty-five thousand, six hundred eighty-seven".