23191617 has 4 divisors (see below), whose sum is σ = 30922160. Its totient is φ = 15461076.

The previous prime is 23191607. The next prime is 23191639. The reversal of 23191617 is 71619132.

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 not a de Polignac number, because 23191617 - 2¹⁰ = 23190593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23191607) 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, 3865267 + ... + 3865272.

It is an arithmetic number, because the mean of its divisors is an integer number (7730540).

Almost surely, 2^23191617 is an apocalyptic number.

It is an amenable number.

23191617 is a deficient number, since it is larger than the sum of its proper divisors (7730543).

23191617 is an equidigital number, since it uses as much as digits as its factorization.

23191617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7730542.

The product of its digits is 2268, while the sum is 30.

The square root of 23191617 is about 4815.7675400708. The cubic root of 23191617 is about 285.1742732220.

The spelling of 23191617 in words is "twenty-three million, one hundred ninety-one thousand, six hundred seventeen".