23090217 has 4 divisors (see below), whose sum is σ = 30786960. Its totient is φ = 15393476.

The previous prime is 23090209. The next prime is 23090219. The reversal of 23090217 is 71209032.

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 23090217 - 2³ = 23090209 is a prime.

It is a super-2 number, since 2×23090217² = 1066316242214178, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23090219) 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, 3848367 + ... + 3848372.

It is an arithmetic number, because the mean of its divisors is an integer number (7696740).

Almost surely, 2^23090217 is an apocalyptic number.

It is an amenable number.

23090217 is a deficient number, since it is larger than the sum of its proper divisors (7696743).

23090217 is an equidigital number, since it uses as much as digits as its factorization.

23090217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7696742.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 23090217 is about 4805.2280903200. The cubic root of 23090217 is about 284.7580464190.

Adding to 23090217 its reverse (71209032), we get a palindrome (94299249).

The spelling of 23090217 in words is "twenty-three million, ninety thousand, two hundred seventeen".