23929805 has 4 divisors (see below), whose sum is σ = 28715772. Its totient is φ = 19143840.

The previous prime is 23929793. The next prime is 23929819. The reversal of 23929805 is 50892932.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14845609 + 9084196 = 3853^2 + 3014^2 .

It is a de Polignac number, because none of the positive numbers 2^k-23929805 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2392976 + ... + 2392985.

It is an arithmetic number, because the mean of its divisors is an integer number (7178943).

Almost surely, 2^23929805 is an apocalyptic number.

It is an amenable number.

23929805 is a deficient number, since it is larger than the sum of its proper divisors (4785967).

23929805 is an equidigital number, since it uses as much as digits as its factorization.

23929805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4785966.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 23929805 is about 4891.8099922217. The cubic root of 23929805 is about 288.1684208115.

The spelling of 23929805 in words is "twenty-three million, nine hundred twenty-nine thousand, eight hundred five".