123381239 has 2 divisors, whose sum is σ = 123381240. Its totient is φ = 123381238.

The previous prime is 123381229. The next prime is 123381263. The reversal of 123381239 is 932183321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123381239 - 2²⁴ = 106604023 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123381229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61690619 + 61690620.

It is an arithmetic number, because the mean of its divisors is an integer number (61690620).

Almost surely, 2^123381239 is an apocalyptic number.

123381239 is a deficient number, since it is larger than the sum of its proper divisors (1).

123381239 is an equidigital number, since it uses as much as digits as its factorization.

123381239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 32.

The square root of 123381239 is about 11107.7107902574. The cubic root of 123381239 is about 497.8322674530.

The spelling of 123381239 in words is "one hundred twenty-three million, three hundred eighty-one thousand, two hundred thirty-nine".