136638807 has 16 divisors (see below), whose sum is σ = 189840000. Its totient is φ = 87310944.

The previous prime is 136638787. The next prime is 136638851. The reversal of 136638807 is 708836631.

It is not a de Polignac number, because 136638807 - 2¹² = 136634711 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136638857) 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 in 15 ways as a sum of consecutive naturals, for example, 6444 + ... + 17742.

It is an arithmetic number, because the mean of its divisors is an integer number (11865000).

Almost surely, 2^136638807 is an apocalyptic number.

136638807 is a deficient number, since it is larger than the sum of its proper divisors (53201193).

136638807 is a wasteful number, since it uses less digits than its factorization.

136638807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11470.

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 136638807 is about 11689.2603273261. The cubic root of 136638807 is about 515.0602336310.

The spelling of 136638807 in words is "one hundred thirty-six million, six hundred thirty-eight thousand, eight hundred seven".