131387587 has 2 divisors, whose sum is σ = 131387588. Its totient is φ = 131387586.

The previous prime is 131387573. The next prime is 131387593. The reversal of 131387587 is 785783131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131387587 - 2¹⁵ = 131354819 is a prime.

It is not a weakly prime, because it can be changed into another prime (131387287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65693793 + 65693794.

It is an arithmetic number, because the mean of its divisors is an integer number (65693794).

Almost surely, 2^131387587 is an apocalyptic number.

131387587 is a deficient number, since it is larger than the sum of its proper divisors (1).

131387587 is an equidigital number, since it uses as much as digits as its factorization.

131387587 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 43.

The square root of 131387587 is about 11462.4424535088. The cubic root of 131387587 is about 508.3756947110.

The spelling of 131387587 in words is "one hundred thirty-one million, three hundred eighty-seven thousand, five hundred eighty-seven".