23290189 has 4 divisors (see below), whose sum is σ = 25081756. Its totient is φ = 21498624.

The previous prime is 23290171. The next prime is 23290193. The reversal of 23290189 is 98109232.

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 1340964 + 21949225 = 1158^2 + 4685^2 .

It is a cyclic number.

It is not a de Polignac number, because 23290189 - 2⁷ = 23290061 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23290129) 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, 895764 + ... + 895789.

It is an arithmetic number, because the mean of its divisors is an integer number (6270439).

Almost surely, 2^23290189 is an apocalyptic number.

It is an amenable number.

23290189 is a deficient number, since it is larger than the sum of its proper divisors (1791567).

23290189 is a wasteful number, since it uses less digits than its factorization.

23290189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1791566.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 23290189 is about 4825.9909863157. The cubic root of 23290189 is about 285.5777303041.

The spelling of 23290189 in words is "twenty-three million, two hundred ninety thousand, one hundred eighty-nine".