123939317 has 2 divisors, whose sum is σ = 123939318. Its totient is φ = 123939316.

The previous prime is 123939259. The next prime is 123939331. The reversal of 123939317 is 713939321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94497841 + 29441476 = 9721^2 + 5426^2 .

It is an emirp because it is prime and its reverse (713939321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123939317 - 2⁶ = 123939253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123939377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61969658 + 61969659.

It is an arithmetic number, because the mean of its divisors is an integer number (61969659).

Almost surely, 2^123939317 is an apocalyptic number.

It is an amenable number.

123939317 is a deficient number, since it is larger than the sum of its proper divisors (1).

123939317 is an equidigital number, since it uses as much as digits as its factorization.

123939317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30618, while the sum is 38.

The square root of 123939317 is about 11132.8036450842. The cubic root of 123939317 is about 498.5817368631.

The spelling of 123939317 in words is "one hundred twenty-three million, nine hundred thirty-nine thousand, three hundred seventeen".