136139697 has 20 divisors (see below), whose sum is σ = 204122160. Its totient is φ = 90423864.

The previous prime is 136139657. The next prime is 136139699. The reversal of 136139697 is 796931631.

It is not a de Polignac number, because 136139697 - 2⁸ = 136139441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (136139699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 19954 + ... + 25892.

It is an arithmetic number, because the mean of its divisors is an integer number (10206108).

Almost surely, 2^136139697 is an apocalyptic number.

It is an amenable number.

136139697 is a deficient number, since it is larger than the sum of its proper divisors (67982463).

136139697 is an equidigital number, since it uses as much as digits as its factorization.

136139697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6234 (or 6225 counting only the distinct ones).

The product of its digits is 183708, while the sum is 45.

The square root of 136139697 is about 11667.8917118732. The cubic root of 136139697 is about 514.4323364680.

The spelling of 136139697 in words is "one hundred thirty-six million, one hundred thirty-nine thousand, six hundred ninety-seven".