23591089 has 4 divisors (see below), whose sum is σ = 24228724. Its totient is φ = 22953456.

The previous prime is 23591081. The next prime is 23591101. The reversal of 23591089 is 98019532.

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 14500864 + 9090225 = 3808^2 + 3015^2 .

It is a cyclic number.

It is not a de Polignac number, because 23591089 - 2³ = 23591081 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 637597 = 23591089 / (2 + 3 + 5 + 9 + 1 + 0 + 8 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23591081) 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, 318762 + ... + 318835.

It is an arithmetic number, because the mean of its divisors is an integer number (6057181).

Almost surely, 2^23591089 is an apocalyptic number.

It is an amenable number.

23591089 is a deficient number, since it is larger than the sum of its proper divisors (637635).

23591089 is an equidigital number, since it uses as much as digits as its factorization.

23591089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637634.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 23591089 is about 4857.0658838439. The cubic root of 23591089 is about 286.8023219203.

The spelling of 23591089 in words is "twenty-three million, five hundred ninety-one thousand, eighty-nine".