123926813 has 2 divisors, whose sum is σ = 123926814. Its totient is φ = 123926812.

The previous prime is 123926749. The next prime is 123926833. The reversal of 123926813 is 318629321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105719524 + 18207289 = 10282^2 + 4267^2 .

It is a cyclic number.

It is not a de Polignac number, because 123926813 - 2⁶ = 123926749 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123926833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61963406 + 61963407.

It is an arithmetic number, because the mean of its divisors is an integer number (61963407).

Almost surely, 2^123926813 is an apocalyptic number.

It is an amenable number.

123926813 is a deficient number, since it is larger than the sum of its proper divisors (1).

123926813 is an equidigital number, since it uses as much as digits as its factorization.

123926813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 35.

The square root of 123926813 is about 11132.2420473146. The cubic root of 123926813 is about 498.5649693141.

The spelling of 123926813 in words is "one hundred twenty-three million, nine hundred twenty-six thousand, eight hundred thirteen".