136530857 has 2 divisors, whose sum is σ = 136530858. Its totient is φ = 136530856.

The previous prime is 136530833. The next prime is 136530983. The reversal of 136530857 is 758035631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97042201 + 39488656 = 9851^2 + 6284^2 .

It is a cyclic number.

It is not a de Polignac number, because 136530857 - 2²⁶ = 69421993 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 136530857.

It is not a weakly prime, because it can be changed into another prime (136530157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68265428 + 68265429.

It is an arithmetic number, because the mean of its divisors is an integer number (68265429).

Almost surely, 2^136530857 is an apocalyptic number.

It is an amenable number.

136530857 is a deficient number, since it is larger than the sum of its proper divisors (1).

136530857 is an equidigital number, since it uses as much as digits as its factorization.

136530857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 136530857 is about 11684.6419286172. The cubic root of 136530857 is about 514.9245586543.

The spelling of 136530857 in words is "one hundred thirty-six million, five hundred thirty thousand, eight hundred fifty-seven".