136651939 has 2 divisors, whose sum is σ = 136651940. Its totient is φ = 136651938.

The previous prime is 136651919. The next prime is 136651943. The reversal of 136651939 is 939156631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 136651939 - 2²⁵ = 103097507 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 136651895 and 136651904.

It is not a weakly prime, because it can be changed into another prime (136651919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68325969 + 68325970.

It is an arithmetic number, because the mean of its divisors is an integer number (68325970).

Almost surely, 2^136651939 is an apocalyptic number.

136651939 is a deficient number, since it is larger than the sum of its proper divisors (1).

136651939 is an equidigital number, since it uses as much as digits as its factorization.

136651939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 131220, while the sum is 43.

The square root of 136651939 is about 11689.8220260190. The cubic root of 136651939 is about 515.0767334685.

The spelling of 136651939 in words is "one hundred thirty-six million, six hundred fifty-one thousand, nine hundred thirty-nine".