136808131 has 2 divisors, whose sum is σ = 136808132. Its totient is φ = 136808130.

The previous prime is 136808123. The next prime is 136808137. The reversal of 136808131 is 131808631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 136808131 - 2³ = 136808123 is a prime.

It is a super-2 number, since 2×136808131² = 37432929415426322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 136808093 and 136808102.

It is not a weakly prime, because it can be changed into another prime (136808137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68404065 + 68404066.

It is an arithmetic number, because the mean of its divisors is an integer number (68404066).

Almost surely, 2^136808131 is an apocalyptic number.

136808131 is a deficient number, since it is larger than the sum of its proper divisors (1).

136808131 is an equidigital number, since it uses as much as digits as its factorization.

136808131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 136808131 is about 11696.5008015218. The cubic root of 136808131 is about 515.2729015181.

The spelling of 136808131 in words is "one hundred thirty-six million, eight hundred eight thousand, one hundred thirty-one".