123935888729 has 2 divisors, whose sum is σ = 123935888730. Its totient is φ = 123935888728.

The previous prime is 123935888719. The next prime is 123935888821. The reversal of 123935888729 is 927888539321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74173433104 + 49762455625 = 272348^2 + 223075^2 .

It is a cyclic number.

It is not a de Polignac number, because 123935888729 - 2⁸ = 123935888473 is a prime.

It is not a weakly prime, because it can be changed into another prime (123935888719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61967944364 + 61967944365.

It is an arithmetic number, because the mean of its divisors is an integer number (61967944365).

Almost surely, 2^123935888729 is an apocalyptic number.

It is an amenable number.

123935888729 is a deficient number, since it is larger than the sum of its proper divisors (1).

123935888729 is an equidigital number, since it uses as much as digits as its factorization.

123935888729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52254720, while the sum is 65.

The spelling of 123935888729 in words is "one hundred twenty-three billion, nine hundred thirty-five million, eight hundred eighty-eight thousand, seven hundred twenty-nine".