23809993 has 2 divisors, whose sum is σ = 23809994. Its totient is φ = 23809992.

The previous prime is 23809987. The next prime is 23810029. The reversal of 23809993 is 39990832.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12873744 + 10936249 = 3588^2 + 3307^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23809993 is a prime.

It is not a weakly prime, because it can be changed into another prime (23809963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11904996 + 11904997.

It is an arithmetic number, because the mean of its divisors is an integer number (11904997).

Almost surely, 2^23809993 is an apocalyptic number.

It is an amenable number.

23809993 is a deficient number, since it is larger than the sum of its proper divisors (1).

23809993 is an equidigital number, since it uses as much as digits as its factorization.

23809993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 43.

The square root of 23809993 is about 4879.5484422229. The cubic root of 23809993 is about 287.6866810255.

The spelling of 23809993 in words is "twenty-three million, eight hundred nine thousand, nine hundred ninety-three".