123957913 has 2 divisors, whose sum is σ = 123957914. Its totient is φ = 123957912.

The previous prime is 123957901. The next prime is 123957923. The reversal of 123957913 is 319759321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118635664 + 5322249 = 10892^2 + 2307^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123957913 is a prime.

It is not a weakly prime, because it can be changed into another prime (123957923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61978956 + 61978957.

It is an arithmetic number, because the mean of its divisors is an integer number (61978957).

Almost surely, 2^123957913 is an apocalyptic number.

It is an amenable number.

123957913 is a deficient number, since it is larger than the sum of its proper divisors (1).

123957913 is an equidigital number, since it uses as much as digits as its factorization.

123957913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51030, while the sum is 40.

The square root of 123957913 is about 11133.6388031946. The cubic root of 123957913 is about 498.6066715449.

The spelling of 123957913 in words is "one hundred twenty-three million, nine hundred fifty-seven thousand, nine hundred thirteen".