136723907 has 4 divisors (see below), whose sum is σ = 136750536. Its totient is φ = 136697280.

The previous prime is 136723897. The next prime is 136723913. The reversal of 136723907 is 709327631.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 136723907 - 2⁸ = 136723651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136723927) 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 3 ways as a sum of consecutive naturals, for example, 2894 + ... + 16787.

It is an arithmetic number, because the mean of its divisors is an integer number (34187634).

Almost surely, 2^136723907 is an apocalyptic number.

136723907 is a deficient number, since it is larger than the sum of its proper divisors (26629).

136723907 is an equidigital number, since it uses as much as digits as its factorization.

136723907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26628.

The product of its (nonzero) digits is 47628, while the sum is 38.

The square root of 136723907 is about 11692.8998541850. The cubic root of 136723907 is about 515.1671396421.

The spelling of 136723907 in words is "one hundred thirty-six million, seven hundred twenty-three thousand, nine hundred seven".