123568813 has 2 divisors, whose sum is σ = 123568814. Its totient is φ = 123568812.

The previous prime is 123568807. The next prime is 123568847. The reversal of 123568813 is 318865321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67947049 + 55621764 = 8243^2 + 7458^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123568813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123568853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61784406 + 61784407.

It is an arithmetic number, because the mean of its divisors is an integer number (61784407).

Almost surely, 2^123568813 is an apocalyptic number.

It is an amenable number.

123568813 is a deficient number, since it is larger than the sum of its proper divisors (1).

123568813 is an equidigital number, since it uses as much as digits as its factorization.

123568813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 37.

The square root of 123568813 is about 11116.1509975351. The cubic root of 123568813 is about 498.0844211542.

The spelling of 123568813 in words is "one hundred twenty-three million, five hundred sixty-eight thousand, eight hundred thirteen".