123316813 has 2 divisors, whose sum is σ = 123316814. Its totient is φ = 123316812.

The previous prime is 123316741. The next prime is 123316829. The reversal of 123316813 is 318613321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64288324 + 59028489 = 8018^2 + 7683^2 .

It is a cyclic number.

It is not a de Polignac number, because 123316813 - 2¹³ = 123308621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123316883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61658406 + 61658407.

It is an arithmetic number, because the mean of its divisors is an integer number (61658407).

Almost surely, 2^123316813 is an apocalyptic number.

It is an amenable number.

123316813 is a deficient number, since it is larger than the sum of its proper divisors (1).

123316813 is an equidigital number, since it uses as much as digits as its factorization.

123316813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 28.

The square root of 123316813 is about 11104.8103540763. The cubic root of 123316813 is about 497.7456013166.

The spelling of 123316813 in words is "one hundred twenty-three million, three hundred sixteen thousand, eight hundred thirteen".