136623911 has 4 divisors (see below), whose sum is σ = 137541000. Its totient is φ = 135706824.

The previous prime is 136623871. The next prime is 136623923. The reversal of 136623911 is 119326631.

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 136623911 - 2⁶ = 136623847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136626911) 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, 458321 + ... + 458618.

It is an arithmetic number, because the mean of its divisors is an integer number (34385250).

Almost surely, 2^136623911 is an apocalyptic number.

136623911 is a deficient number, since it is larger than the sum of its proper divisors (917089).

136623911 is an equidigital number, since it uses as much as digits as its factorization.

136623911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917088.

The product of its digits is 5832, while the sum is 32.

The square root of 136623911 is about 11688.6231438951. The cubic root of 136623911 is about 515.0415161177.

The spelling of 136623911 in words is "one hundred thirty-six million, six hundred twenty-three thousand, nine hundred eleven".