123439793 has 2 divisors, whose sum is σ = 123439794. Its totient is φ = 123439792.

The previous prime is 123439777. The next prime is 123439829. The reversal of 123439793 is 397934321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103876864 + 19562929 = 10192^2 + 4423^2 .

It is a cyclic number.

It is not a de Polignac number, because 123439793 - 2⁴ = 123439777 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123439793.

It is not a weakly prime, because it can be changed into another prime (123439753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61719896 + 61719897.

It is an arithmetic number, because the mean of its divisors is an integer number (61719897).

Almost surely, 2^123439793 is an apocalyptic number.

It is an amenable number.

123439793 is a deficient number, since it is larger than the sum of its proper divisors (1).

123439793 is an equidigital number, since it uses as much as digits as its factorization.

123439793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122472, while the sum is 41.

The square root of 123439793 is about 11110.3462142275. The cubic root of 123439793 is about 497.9110083829.

The spelling of 123439793 in words is "one hundred twenty-three million, four hundred thirty-nine thousand, seven hundred ninety-three".