136605623 has 32 divisors (see below), whose sum is σ = 177438720. Its totient is φ = 102060000.

The previous prime is 136605617. The next prime is 136605629. The reversal of 136605623 is 326506631.

It is an interprime number because it is at equal distance from previous prime (136605617) and next prime (136605629).

It is not a de Polignac number, because 136605623 - 2⁴ = 136605607 is a prime.

It is a super-2 number, since 2×136605623² = 37322192470436258, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 136605623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136605629) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 360248 + ... + 360626.

It is an arithmetic number, because the mean of its divisors is an integer number (5544960).

Almost surely, 2^136605623 is an apocalyptic number.

136605623 is a deficient number, since it is larger than the sum of its proper divisors (40833097).

136605623 is a wasteful number, since it uses less digits than its factorization.

136605623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579.

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 136605623 is about 11687.8408185601. The cubic root of 136605623 is about 515.0185345389.

The spelling of 136605623 in words is "one hundred thirty-six million, six hundred five thousand, six hundred twenty-three".