123130439 has 4 divisors (see below), whose sum is σ = 130373424. Its totient is φ = 115887456.

The previous prime is 123130379. The next prime is 123130451. The reversal of 123130439 is 934031321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 934031321 = 907 ⋅1029803.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123130439 is a prime.

It is a super-2 number, since 2×123130439² = 30322210016665442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123130039) 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, 3621467 + ... + 3621500.

It is an arithmetic number, because the mean of its divisors is an integer number (32593356).

Almost surely, 2^123130439 is an apocalyptic number.

123130439 is a deficient number, since it is larger than the sum of its proper divisors (7242985).

123130439 is an equidigital number, since it uses as much as digits as its factorization.

123130439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7242984.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 123130439 is about 11096.4155924334. The cubic root of 123130439 is about 497.4947201110.

The spelling of 123130439 in words is "one hundred twenty-three million, one hundred thirty thousand, four hundred thirty-nine".