23499985 has 4 divisors (see below), whose sum is σ = 28199988. Its totient is φ = 18799984.

The previous prime is 23499977. The next prime is 23499989. The reversal of 23499985 is 58999432.

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 16096144 + 7403841 = 4012^2 + 2721^2 .

It is a cyclic number.

It is not a de Polignac number, because 23499985 - 2³ = 23499977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23499989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2349994 + ... + 2350003.

It is an arithmetic number, because the mean of its divisors is an integer number (7049997).

Almost surely, 2^23499985 is an apocalyptic number.

It is an amenable number.

23499985 is a deficient number, since it is larger than the sum of its proper divisors (4700003).

23499985 is an equidigital number, since it uses as much as digits as its factorization.

23499985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4700002.

The product of its digits is 699840, while the sum is 49.

The square root of 23499985 is about 4847.6783102842. The cubic root of 23499985 is about 286.4326548560.

The spelling of 23499985 in words is "twenty-three million, four hundred ninety-nine thousand, nine hundred eighty-five".