136539797 has 2 divisors, whose sum is σ = 136539798. Its totient is φ = 136539796.

The previous prime is 136539791. The next prime is 136539829. The reversal of 136539797 is 797935631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68790436 + 67749361 = 8294^2 + 8231^2 .

It is an emirp because it is prime and its reverse (797935631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 136539797 - 2⁸ = 136539541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136539791) 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 as a sum of consecutive naturals, namely, 68269898 + 68269899.

It is an arithmetic number, because the mean of its divisors is an integer number (68269899).

Almost surely, 2^136539797 is an apocalyptic number.

It is an amenable number.

136539797 is a deficient number, since it is larger than the sum of its proper divisors (1).

136539797 is an equidigital number, since it uses as much as digits as its factorization.

136539797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1071630, while the sum is 50.

The square root of 136539797 is about 11685.0244757981. The cubic root of 136539797 is about 514.9357974447.

The spelling of 136539797 in words is "one hundred thirty-six million, five hundred thirty-nine thousand, seven hundred ninety-seven".