136986131 has 2 divisors, whose sum is σ = 136986132. Its totient is φ = 136986130.

The previous prime is 136986127. The next prime is 136986151. The reversal of 136986131 is 131689631.

It is a weak prime.

It is an emirp because it is prime and its reverse (131689631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 136986131 - 2² = 136986127 is a prime.

It is a super-2 number, since 2×136986131² = 37530400172698322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (136986121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68493065 + 68493066.

It is an arithmetic number, because the mean of its divisors is an integer number (68493066).

Almost surely, 2^136986131 is an apocalyptic number.

136986131 is a deficient number, since it is larger than the sum of its proper divisors (1).

136986131 is an equidigital number, since it uses as much as digits as its factorization.

136986131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 38.

The square root of 136986131 is about 11704.1074414071. The cubic root of 136986131 is about 515.4962771962.

The spelling of 136986131 in words is "one hundred thirty-six million, nine hundred eighty-six thousand, one hundred thirty-one".