136116521 has 2 divisors, whose sum is σ = 136116522. Its totient is φ = 136116520.

The previous prime is 136116499. The next prime is 136116557. The reversal of 136116521 is 125611631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113124496 + 22992025 = 10636^2 + 4795^2 .

It is a cyclic number.

It is not a de Polignac number, because 136116521 - 2²⁶ = 69007657 is a prime.

It is not a weakly prime, because it can be changed into another prime (136116121) 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, 68058260 + 68058261.

It is an arithmetic number, because the mean of its divisors is an integer number (68058261).

Almost surely, 2^136116521 is an apocalyptic number.

It is an amenable number.

136116521 is a deficient number, since it is larger than the sum of its proper divisors (1).

136116521 is an equidigital number, since it uses as much as digits as its factorization.

136116521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 26.

The square root of 136116521 is about 11666.8985167439. The cubic root of 136116521 is about 514.4031430226.

The spelling of 136116521 in words is "one hundred thirty-six million, one hundred sixteen thousand, five hundred twenty-one".