23040989 has 4 divisors (see below), whose sum is σ = 23150400. Its totient is φ = 22931580.

The previous prime is 23040971. The next prime is 23041013. The reversal of 23040989 is 98904032.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23040989 - 2²⁴ = 6263773 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23040929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54389 + ... + 54810.

It is an arithmetic number, because the mean of its divisors is an integer number (5787600).

Almost surely, 2^23040989 is an apocalyptic number.

It is an amenable number.

23040989 is a deficient number, since it is larger than the sum of its proper divisors (109411).

23040989 is a wasteful number, since it uses less digits than its factorization.

23040989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109410.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 23040989 is about 4800.1030197278. The cubic root of 23040989 is about 284.5555357911. Note that the first 4 decimals are identical.

The spelling of 23040989 in words is "twenty-three million, forty thousand, nine hundred eighty-nine".