23898559 has 4 divisors (see below), whose sum is σ = 24544504. Its totient is φ = 23252616.

The previous prime is 23898533. The next prime is 23898647. The reversal of 23898559 is 95589832.

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 23898559 - 2¹⁹ = 23374271 is a prime.

It is a super-2 number, since 2×23898559² = 1142282244552962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23898509) 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, 322917 + ... + 322990.

It is an arithmetic number, because the mean of its divisors is an integer number (6136126).

Almost surely, 2^23898559 is an apocalyptic number.

23898559 is a deficient number, since it is larger than the sum of its proper divisors (645945).

23898559 is an equidigital number, since it uses as much as digits as its factorization.

23898559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645944.

The product of its digits is 777600, while the sum is 49.

The square root of 23898559 is about 4888.6152436043. The cubic root of 23898559 is about 288.0429422529.

The spelling of 23898559 in words is "twenty-three million, eight hundred ninety-eight thousand, five hundred fifty-nine".