136646123 has 4 divisors (see below), whose sum is σ = 137354328. Its totient is φ = 135937920.

The previous prime is 136646087. The next prime is 136646141. The reversal of 136646123 is 321646631.

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 136646123 - 2²² = 132451819 is a prime.

It is a super-2 number, since 2×136646123² = 37344325861862258, 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 136646123.

It is not an unprimeable number, because it can be changed into a prime (136648123) 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, 353813 + ... + 354198.

It is an arithmetic number, because the mean of its divisors is an integer number (34338582).

Almost surely, 2^136646123 is an apocalyptic number.

136646123 is a deficient number, since it is larger than the sum of its proper divisors (708205).

136646123 is an equidigital number, since it uses as much as digits as its factorization.

136646123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708204.

The product of its digits is 15552, while the sum is 32.

The square root of 136646123 is about 11689.5732599612. The cubic root of 136646123 is about 515.0694260255.

The spelling of 136646123 in words is "one hundred thirty-six million, six hundred forty-six thousand, one hundred twenty-three".