23078813 has 2 divisors, whose sum is σ = 23078814. Its totient is φ = 23078812.

The previous prime is 23078791. The next prime is 23078819. The reversal of 23078813 is 31887032.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16662724 + 6416089 = 4082^2 + 2533^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23078813 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23078813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23078819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11539406 + 11539407.

It is an arithmetic number, because the mean of its divisors is an integer number (11539407).

Almost surely, 2^23078813 is an apocalyptic number.

It is an amenable number.

23078813 is a deficient number, since it is larger than the sum of its proper divisors (1).

23078813 is an equidigital number, since it uses as much as digits as its factorization.

23078813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 23078813 is about 4804.0413195559. The cubic root of 23078813 is about 284.7111590941.

The spelling of 23078813 in words is "twenty-three million, seventy-eight thousand, eight hundred thirteen".