136626813 has 12 divisors (see below), whose sum is σ = 199161820. Its totient is φ = 90248256.

The previous prime is 136626803. The next prime is 136626821. The reversal of 136626813 is 318626631.

136626813 is a `hidden beast` number, since 13 + 6 + 626 + 8 + 13 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 122810724 + 13816089 = 11082^2 + 3717^2 .

It is not a de Polignac number, because 136626813 - 2⁴ = 136626797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136626803) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68656 + ... + 70617.

Almost surely, 2^136626813 is an apocalyptic number.

It is an amenable number.

136626813 is a deficient number, since it is larger than the sum of its proper divisors (62535007).

136626813 is a wasteful number, since it uses less digits than its factorization.

136626813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139388 (or 139385 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 136626813 is about 11688.7472810391. The cubic root of 136626813 is about 515.0451627217.

The spelling of 136626813 in words is "one hundred thirty-six million, six hundred twenty-six thousand, eight hundred thirteen".