136872557 has 2 divisors, whose sum is σ = 136872558. Its totient is φ = 136872556.

The previous prime is 136872521. The next prime is 136872611. The reversal of 136872557 is 755278631.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127667401 + 9205156 = 11299^2 + 3034^2 .

It is a cyclic number.

It is not a de Polignac number, because 136872557 - 2¹⁰ = 136871533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136871557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68436278 + 68436279.

It is an arithmetic number, because the mean of its divisors is an integer number (68436279).

Almost surely, 2^136872557 is an apocalyptic number.

It is an amenable number.

136872557 is a deficient number, since it is larger than the sum of its proper divisors (1).

136872557 is an equidigital number, since it uses as much as digits as its factorization.

136872557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 352800, while the sum is 44.

The square root of 136872557 is about 11699.2545489018. The cubic root of 136872557 is about 515.3537733250.

The spelling of 136872557 in words is "one hundred thirty-six million, eight hundred seventy-two thousand, five hundred fifty-seven".