23391985 has 4 divisors (see below), whose sum is σ = 28070388. Its totient is φ = 18713584.

The previous prime is 23391941. The next prime is 23392007. The reversal of 23391985 is 58919332.

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 13601344 + 9790641 = 3688^2 + 3129^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23391985 is a prime.

It is a Duffinian 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, 2339194 + ... + 2339203.

It is an arithmetic number, because the mean of its divisors is an integer number (7017597).

Almost surely, 2^23391985 is an apocalyptic number.

It is an amenable number.

23391985 is a deficient number, since it is larger than the sum of its proper divisors (4678403).

23391985 is an equidigital number, since it uses as much as digits as its factorization.

23391985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4678402.

The product of its digits is 58320, while the sum is 40.

The square root of 23391985 is about 4836.5261293619. The cubic root of 23391985 is about 285.9931902139.

The spelling of 23391985 in words is "twenty-three million, three hundred ninety-one thousand, nine hundred eighty-five".