131587139 has 2 divisors, whose sum is σ = 131587140. Its totient is φ = 131587138.

The previous prime is 131587109. The next prime is 131587153. The reversal of 131587139 is 931785131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131587139 - 2⁸ = 131586883 is a prime.

It is not a weakly prime, because it can be changed into another prime (131587109) 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 as a sum of consecutive naturals, namely, 65793569 + 65793570.

It is an arithmetic number, because the mean of its divisors is an integer number (65793570).

Almost surely, 2^131587139 is an apocalyptic number.

131587139 is a deficient number, since it is larger than the sum of its proper divisors (1).

131587139 is an equidigital number, since it uses as much as digits as its factorization.

131587139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 38.

The square root of 131587139 is about 11471.1437529132. The cubic root of 131587139 is about 508.6329388761.

The spelling of 131587139 in words is "one hundred thirty-one million, five hundred eighty-seven thousand, one hundred thirty-nine".