23090549 has 4 divisors (see below), whose sum is σ = 23415840. Its totient is φ = 22765260.

The previous prime is 23090537. The next prime is 23090569. The reversal of 23090549 is 94509032.

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 a de Polignac number, because none of the positive numbers 2^k-23090549 is a prime.

It is an alternating number because its digits alternate between even and odd.

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 (23090569) 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, 162539 + ... + 162680.

It is an arithmetic number, because the mean of its divisors is an integer number (5853960).

Almost surely, 2^23090549 is an apocalyptic number.

It is an amenable number.

23090549 is a deficient number, since it is larger than the sum of its proper divisors (325291).

23090549 is an equidigital number, since it uses as much as digits as its factorization.

23090549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325290.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 23090549 is about 4805.2626359024. The cubic root of 23090549 is about 284.7594111993.

The spelling of 23090549 in words is "twenty-three million, ninety thousand, five hundred forty-nine".