23309893 has 4 divisors (see below), whose sum is σ = 23352300. Its totient is φ = 23267488.

The previous prime is 23309863. The next prime is 23309911. The reversal of 23309893 is 39890332.

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 10227204 + 13082689 = 3198^2 + 3617^2 .

It is a cyclic number.

It is not a de Polignac number, because 23309893 - 2¹³ = 23301701 is a prime.

It is a super-2 number, since 2×23309893² = 1086702223342898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23309813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20368 + ... + 21481.

It is an arithmetic number, because the mean of its divisors is an integer number (5838075).

Almost surely, 2^23309893 is an apocalyptic number.

It is an amenable number.

23309893 is a deficient number, since it is larger than the sum of its proper divisors (42407).

23309893 is an equidigital number, since it uses as much as digits as its factorization.

23309893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42406.

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 23309893 is about 4828.0320007224. The cubic root of 23309893 is about 285.6582425673.

The spelling of 23309893 in words is "twenty-three million, three hundred nine thousand, eight hundred ninety-three".