123393121 has 2 divisors, whose sum is σ = 123393122. Its totient is φ = 123393120.

The previous prime is 123393097. The next prime is 123393133. The reversal of 123393121 is 121393321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81000000 + 42393121 = 9000^2 + 6511^2 .

It is a cyclic number.

It is not a de Polignac number, because 123393121 - 2⁷ = 123392993 is a prime.

It is not a weakly prime, because it can be changed into another prime (123393161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61696560 + 61696561.

It is an arithmetic number, because the mean of its divisors is an integer number (61696561).

Almost surely, 2^123393121 is an apocalyptic number.

It is an amenable number.

123393121 is a deficient number, since it is larger than the sum of its proper divisors (1).

123393121 is an equidigital number, since it uses as much as digits as its factorization.

123393121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 972, while the sum is 25.

The square root of 123393121 is about 11108.2456310616. The cubic root of 123393121 is about 497.8482478758.

The spelling of 123393121 in words is "one hundred twenty-three million, three hundred ninety-three thousand, one hundred twenty-one".