136815697 has 2 divisors, whose sum is σ = 136815698. Its totient is φ = 136815696.

The previous prime is 136815683. The next prime is 136815709. The reversal of 136815697 is 796518631.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83101456 + 53714241 = 9116^2 + 7329^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136815697 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (136815197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68407848 + 68407849.

It is an arithmetic number, because the mean of its divisors is an integer number (68407849).

Almost surely, 2^136815697 is an apocalyptic number.

It is an amenable number.

136815697 is a deficient number, since it is larger than the sum of its proper divisors (1).

136815697 is an equidigital number, since it uses as much as digits as its factorization.

136815697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 46.

The square root of 136815697 is about 11696.8242271140. The cubic root of 136815697 is about 515.2824001809.

The spelling of 136815697 in words is "one hundred thirty-six million, eight hundred fifteen thousand, six hundred ninety-seven".