23923993 has 2 divisors, whose sum is σ = 23923994. Its totient is φ = 23923992.

The previous prime is 23923973. The next prime is 23924027. The reversal of 23923993 is 39932932.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22353984 + 1570009 = 4728^2 + 1253^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23923993 is a prime.

It is not a weakly prime, because it can be changed into another prime (23923903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11961996 + 11961997.

It is an arithmetic number, because the mean of its divisors is an integer number (11961997).

Almost surely, 2^23923993 is an apocalyptic number.

It is an amenable number.

23923993 is a deficient number, since it is larger than the sum of its proper divisors (1).

23923993 is an equidigital number, since it uses as much as digits as its factorization.

23923993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 78732, while the sum is 40.

The square root of 23923993 is about 4891.2159020023. The cubic root of 23923993 is about 288.1450890923.

The spelling of 23923993 in words is "twenty-three million, nine hundred twenty-three thousand, nine hundred ninety-three".