123131339 has 2 divisors, whose sum is σ = 123131340. Its totient is φ = 123131338.

The previous prime is 123131329. The next prime is 123131347. The reversal of 123131339 is 933131321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123131339 - 2⁸ = 123131083 is a prime.

It is a super-2 number, since 2×123131339² = 30322653287865842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123131329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61565669 + 61565670.

It is an arithmetic number, because the mean of its divisors is an integer number (61565670).

Almost surely, 2^123131339 is an apocalyptic number.

123131339 is a deficient number, since it is larger than the sum of its proper divisors (1).

123131339 is an equidigital number, since it uses as much as digits as its factorization.

123131339 is an odious number, because the sum of its binary digits is odd.

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

The square root of 123131339 is about 11096.4561459954. The cubic root of 123131339 is about 497.4959322243.

The spelling of 123131339 in words is "one hundred twenty-three million, one hundred thirty-one thousand, three hundred thirty-nine".