23291643 has 4 divisors (see below), whose sum is σ = 31055528. Its totient is φ = 15527760.

The previous prime is 23291641. The next prime is 23291647. The reversal of 23291643 is 34619232.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 23291643 - 2¹ = 23291641 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23291643.

It is not an unprimeable number, because it can be changed into a prime (23291641) 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, 3881938 + ... + 3881943.

It is an arithmetic number, because the mean of its divisors is an integer number (7763882).

Almost surely, 2^23291643 is an apocalyptic number.

23291643 is a deficient number, since it is larger than the sum of its proper divisors (7763885).

23291643 is an equidigital number, since it uses as much as digits as its factorization.

23291643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7763884.

The product of its digits is 7776, while the sum is 30.

The square root of 23291643 is about 4826.1416265999. The cubic root of 23291643 is about 285.5836730264.

The spelling of 23291643 in words is "twenty-three million, two hundred ninety-one thousand, six hundred forty-three".