123398113 has 2 divisors, whose sum is σ = 123398114. Its totient is φ = 123398112.

The previous prime is 123398083. The next prime is 123398117. The reversal of 123398113 is 311893321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119968209 + 3429904 = 10953^2 + 1852^2 .

It is an emirp because it is prime and its reverse (311893321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123398113 - 2⁵ = 123398081 is a prime.

It is not a weakly prime, because it can be changed into another prime (123398117) 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, 61699056 + 61699057.

It is an arithmetic number, because the mean of its divisors is an integer number (61699057).

Almost surely, 2^123398113 is an apocalyptic number.

It is an amenable number.

123398113 is a deficient number, since it is larger than the sum of its proper divisors (1).

123398113 is an equidigital number, since it uses as much as digits as its factorization.

123398113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 31.

The square root of 123398113 is about 11108.4703267372. The cubic root of 123398113 is about 497.8549614455.

The spelling of 123398113 in words is "one hundred twenty-three million, three hundred ninety-eight thousand, one hundred thirteen".