123013139 has 12 divisors (see below), whose sum is σ = 132646104. Its totient is φ = 114031104.

The previous prime is 123013129. The next prime is 123013151. The reversal of 123013139 is 931310321.

It is not a de Polignac number, because 123013139 - 2²⁴ = 106235923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123013129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16187 + ... + 22539.

It is an arithmetic number, because the mean of its divisors is an integer number (11053842).

Almost surely, 2^123013139 is an apocalyptic number.

123013139 is a deficient number, since it is larger than the sum of its proper divisors (9632965).

123013139 is an equidigital number, since it uses as much as digits as its factorization.

123013139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6454 (or 6437 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 23.

The square root of 123013139 is about 11091.1288424578. The cubic root of 123013139 is about 497.3366907563.

The spelling of 123013139 in words is "one hundred twenty-three million, thirteen thousand, one hundred thirty-nine".