23999999 has 2 divisors, whose sum is σ = 24000000. Its totient is φ = 23999998.

The previous prime is 23999981. The next prime is 24000001. The reversal of 23999999 is 99999932.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23999999 is a prime.

Together with 24000001, it forms a pair of twin primes.

It is a Chen prime.

23999999 is a modest number, since divided by 9999 gives 2399 as remainder.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23999909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11999999 + 12000000.

It is an arithmetic number, because the mean of its divisors is an integer number (12000000).

Almost surely, 2^23999999 is an apocalyptic number.

23999999 is a deficient number, since it is larger than the sum of its proper divisors (1).

23999999 is an equidigital number, since it uses as much as digits as its factorization.

23999999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3188646, while the sum is 59.

The square root of 23999999 is about 4898.9793835043. The cubic root of 23999999 is about 288.4499100552.

The spelling of 23999999 in words is "twenty-three million, nine hundred ninety-nine thousand, nine hundred ninety-nine".