23919967 has 2 divisors, whose sum is σ = 23919968. Its totient is φ = 23919966.

The previous prime is 23919947. The next prime is 23920007. The reversal of 23919967 is 76991932.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23919967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23919947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11959983 + 11959984.

It is an arithmetic number, because the mean of its divisors is an integer number (11959984).

Almost surely, 2^23919967 is an apocalyptic number.

23919967 is a deficient number, since it is larger than the sum of its proper divisors (1).

23919967 is an equidigital number, since it uses as much as digits as its factorization.

23919967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 183708, while the sum is 46.

The square root of 23919967 is about 4890.8043305779. The cubic root of 23919967 is about 288.1289248841.

The spelling of 23919967 in words is "twenty-three million, nine hundred nineteen thousand, nine hundred sixty-seven".