123964013 has 2 divisors, whose sum is σ = 123964014. Its totient is φ = 123964012.

The previous prime is 123964007. The next prime is 123964021. The reversal of 123964013 is 310469321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118309129 + 5654884 = 10877^2 + 2378^2 .

It is a cyclic number.

It is not a de Polignac number, because 123964013 - 2⁸ = 123963757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123964213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61982006 + 61982007.

It is an arithmetic number, because the mean of its divisors is an integer number (61982007).

Almost surely, 2^123964013 is an apocalyptic number.

It is an amenable number.

123964013 is a deficient number, since it is larger than the sum of its proper divisors (1).

123964013 is an equidigital number, since it uses as much as digits as its factorization.

123964013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 123964013 is about 11133.9127444039. The cubic root of 123964013 is about 498.6148502639.

The spelling of 123964013 in words is "one hundred twenty-three million, nine hundred sixty-four thousand, thirteen".