123938393 has 2 divisors, whose sum is σ = 123938394. Its totient is φ = 123938392.

The previous prime is 123938363. The next prime is 123938407. The reversal of 123938393 is 393839321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110418064 + 13520329 = 10508^2 + 3677^2 .

It is an emirp because it is prime and its reverse (393839321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123938393 - 2⁸ = 123938137 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 123938393.

It is not a weakly prime, because it can be changed into another prime (123938303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61969196 + 61969197.

It is an arithmetic number, because the mean of its divisors is an integer number (61969197).

Almost surely, 2^123938393 is an apocalyptic number.

It is an amenable number.

123938393 is a deficient number, since it is larger than the sum of its proper divisors (1).

123938393 is an equidigital number, since it uses as much as digits as its factorization.

123938393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 104976, while the sum is 41.

The square root of 123938393 is about 11132.7621460265. The cubic root of 123938393 is about 498.5804978409.

The spelling of 123938393 in words is "one hundred twenty-three million, nine hundred thirty-eight thousand, three hundred ninety-three".