23498009 has 4 divisors (see below), whose sum is σ = 23508660. Its totient is φ = 23487360.

The previous prime is 23497987. The next prime is 23498017. The reversal of 23498009 is 90089432.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2310400 + 21187609 = 1520^2 + 4603^2 .

It is a cyclic number.

It is not a de Polignac number, because 23498009 - 2¹⁶ = 23432473 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 23498009.

It is not an unprimeable number, because it can be changed into a prime (23498099) 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, 644 + ... + 6885.

It is an arithmetic number, because the mean of its divisors is an integer number (5877165).

Almost surely, 2^23498009 is an apocalyptic number.

It is an amenable number.

23498009 is a deficient number, since it is larger than the sum of its proper divisors (10651).

23498009 is an equidigital number, since it uses as much as digits as its factorization.

23498009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10650.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 23498009 is about 4847.4744970964. The cubic root of 23498009 is about 286.4246263857.

The spelling of 23498009 in words is "twenty-three million, four hundred ninety-eight thousand, nine".