23998563 has 6 divisors (see below), whose sum is σ = 34664604. Its totient is φ = 15999036.

The previous prime is 23998561. The next prime is 23998567. The reversal of 23998563 is 36589932.

It is not a de Polignac number, because 23998563 - 2¹ = 23998561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23998561) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1333245 + ... + 1333262.

It is an arithmetic number, because the mean of its divisors is an integer number (5777434).

Almost surely, 2^23998563 is an apocalyptic number.

23998563 is a deficient number, since it is larger than the sum of its proper divisors (10666041).

23998563 is a wasteful number, since it uses less digits than its factorization.

23998563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2666513 (or 2666510 counting only the distinct ones).

The product of its digits is 349920, while the sum is 45.

The square root of 23998563 is about 4898.8328201726. The cubic root of 23998563 is about 288.4441569670. Note that the first 3 decimals are identical.

The spelling of 23998563 in words is "twenty-three million, nine hundred ninety-eight thousand, five hundred sixty-three".