123954398599 has 2 divisors, whose sum is σ = 123954398600. Its totient is φ = 123954398598.

The previous prime is 123954398549. The next prime is 123954398629. The reversal of 123954398599 is 995893459321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123954398599 - 2²³ = 123946009991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123954398549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61977199299 + 61977199300.

It is an arithmetic number, because the mean of its divisors is an integer number (61977199300).

Almost surely, 2^123954398599 is an apocalyptic number.

123954398599 is a deficient number, since it is larger than the sum of its proper divisors (1).

123954398599 is an equidigital number, since it uses as much as digits as its factorization.

123954398599 is an evil number, because the sum of its binary digits is even.

The product of its digits is 94478400, while the sum is 67.

The spelling of 123954398599 in words is "one hundred twenty-three billion, nine hundred fifty-four million, three hundred ninety-eight thousand, five hundred ninety-nine".