123313139 has 4 divisors (see below), whose sum is σ = 125639856. Its totient is φ = 120986424.

The previous prime is 123313129. The next prime is 123313159. The reversal of 123313139 is 931313321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123313139 is a prime.

It is a super-2 number, since 2×123313139² = 30412260500066642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123313109) 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, 1163279 + ... + 1163384.

It is an arithmetic number, because the mean of its divisors is an integer number (31409964).

Almost surely, 2^123313139 is an apocalyptic number.

123313139 is a deficient number, since it is larger than the sum of its proper divisors (2326717).

123313139 is an equidigital number, since it uses as much as digits as its factorization.

123313139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2326716.

The product of its digits is 1458, while the sum is 26.

The square root of 123313139 is about 11104.6449290376. The cubic root of 123313139 is about 497.7406581261.

The spelling of 123313139 in words is "one hundred twenty-three million, three hundred thirteen thousand, one hundred thirty-nine".