131587913 has 2 divisors, whose sum is σ = 131587914. Its totient is φ = 131587912.

The previous prime is 131587909. The next prime is 131587927. The reversal of 131587913 is 319785131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100540729 + 31047184 = 10027^2 + 5572^2 .

It is a cyclic number.

It is not a de Polignac number, because 131587913 - 2² = 131587909 is a prime.

It is not a weakly prime, because it can be changed into another prime (131587013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65793956 + 65793957.

It is an arithmetic number, because the mean of its divisors is an integer number (65793957).

Almost surely, 2^131587913 is an apocalyptic number.

It is an amenable number.

131587913 is a deficient number, since it is larger than the sum of its proper divisors (1).

131587913 is an equidigital number, since it uses as much as digits as its factorization.

131587913 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 131587913 is about 11471.1774896913. The cubic root of 131587913 is about 508.6339361395.

The spelling of 131587913 in words is "one hundred thirty-one million, five hundred eighty-seven thousand, nine hundred thirteen".