123103139 has 6 divisors (see below), whose sum is σ = 127203300. Its totient is φ = 119131140.

The previous prime is 123103111. The next prime is 123103151. The reversal of 123103139 is 931301321.

It is a de Polignac number, because none of the positive numbers 2^k-123103139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123103159) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 63089 + ... + 65010.

It is an arithmetic number, because the mean of its divisors is an integer number (21200550).

Almost surely, 2^123103139 is an apocalyptic number.

123103139 is a deficient number, since it is larger than the sum of its proper divisors (4100161).

123103139 is an equidigital number, since it uses as much as digits as its factorization.

123103139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128161 (or 128130 counting only the distinct ones).

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

The square root of 123103139 is about 11095.1853972793. The cubic root of 123103139 is about 497.4579498646.

The spelling of 123103139 in words is "one hundred twenty-three million, one hundred three thousand, one hundred thirty-nine".