136645123 has 4 divisors (see below), whose sum is σ = 138517048. Its totient is φ = 134773200.

The previous prime is 136645111. The next prime is 136645151. The reversal of 136645123 is 321546631.

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 136645123 - 2⁹ = 136644611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136645723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 935853 + ... + 935998.

It is an arithmetic number, because the mean of its divisors is an integer number (34629262).

Almost surely, 2^136645123 is an apocalyptic number.

136645123 is a deficient number, since it is larger than the sum of its proper divisors (1871925).

136645123 is an equidigital number, since it uses as much as digits as its factorization.

136645123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1871924.

The product of its digits is 12960, while the sum is 31.

The square root of 136645123 is about 11689.5304867219. The cubic root of 136645123 is about 515.0681695666.

The spelling of 136645123 in words is "one hundred thirty-six million, six hundred forty-five thousand, one hundred twenty-three".