23421899 has 2 divisors, whose sum is σ = 23421900. Its totient is φ = 23421898.

The previous prime is 23421877. The next prime is 23421961. The reversal of 23421899 is 99812432.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23421899 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23426899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11710949 + 11710950.

It is an arithmetic number, because the mean of its divisors is an integer number (11710950).

Almost surely, 2^23421899 is an apocalyptic number.

23421899 is a deficient number, since it is larger than the sum of its proper divisors (1).

23421899 is an equidigital number, since it uses as much as digits as its factorization.

23421899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 38.

The square root of 23421899 is about 4839.6176501868. The cubic root of 23421899 is about 286.1150489908.

The spelling of 23421899 in words is "twenty-three million, four hundred twenty-one thousand, eight hundred ninety-nine".