23825665 has 4 divisors (see below), whose sum is σ = 28590804. Its totient is φ = 19060528.

The previous prime is 23825621. The next prime is 23825713. The reversal of 23825665 is 56652832.

It is a happy number.

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 4032064 + 19793601 = 2008^2 + 4449^2 .

It is a cyclic number.

It is not a de Polignac number, because 23825665 - 2⁷ = 23825537 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2382562 + ... + 2382571.

It is an arithmetic number, because the mean of its divisors is an integer number (7147701).

Almost surely, 2^23825665 is an apocalyptic number.

It is an amenable number.

23825665 is a deficient number, since it is larger than the sum of its proper divisors (4765139).

23825665 is an equidigital number, since it uses as much as digits as its factorization.

23825665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4765138.

The product of its digits is 86400, while the sum is 37.

The square root of 23825665 is about 4881.1540643581. The cubic root of 23825665 is about 287.7497866974.

The spelling of 23825665 in words is "twenty-three million, eight hundred twenty-five thousand, six hundred sixty-five".