23404243 has 4 divisors (see below), whose sum is σ = 23421528. Its totient is φ = 23386960.

The previous prime is 23404237. The next prime is 23404273. The reversal of 23404243 is 34240432.

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

It is a cyclic number.

It is not a de Polignac number, because 23404243 - 2⁵ = 23404211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23404273) 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, 6421 + ... + 9382.

It is an arithmetic number, because the mean of its divisors is an integer number (5855382).

Almost surely, 2^23404243 is an apocalyptic number.

23404243 is a deficient number, since it is larger than the sum of its proper divisors (17285).

23404243 is a wasteful number, since it uses less digits than its factorization.

23404243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17284.

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 23404243 is about 4837.7931952493. The cubic root of 23404243 is about 286.0431374123.

Adding to 23404243 its reverse (34240432), we get a palindrome (57644675).

The spelling of 23404243 in words is "twenty-three million, four hundred four thousand, two hundred forty-three".