136564939 has 16 divisors (see below), whose sum is σ = 159925248. Its totient is φ = 114184512.

The previous prime is 136564933. The next prime is 136564943. The reversal of 136564939 is 939465631.

It is a cyclic number.

It is not a de Polignac number, because 136564939 - 2²³ = 128176331 is a prime.

It is not an unprimeable number, because it can be changed into a prime (136564933) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145279 + ... + 146215.

It is an arithmetic number, because the mean of its divisors is an integer number (9995328).

Almost surely, 2^136564939 is an apocalyptic number.

136564939 is a deficient number, since it is larger than the sum of its proper divisors (23360309).

136564939 is an equidigital number, since it uses as much as digits as its factorization.

136564939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1434.

The product of its digits is 524880, while the sum is 46.

The square root of 136564939 is about 11686.1002477302. The cubic root of 136564939 is about 514.9674017133.

The spelling of 136564939 in words is "one hundred thirty-six million, five hundred sixty-four thousand, nine hundred thirty-nine".