23498209 has 4 divisors (see below), whose sum is σ = 26855104. Its totient is φ = 20141316.

The previous prime is 23498201. The next prime is 23498257. The reversal of 23498209 is 90289432.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23498209 - 2³ = 23498201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23498201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1678437 + ... + 1678450.

It is an arithmetic number, because the mean of its divisors is an integer number (6713776).

Almost surely, 2^23498209 is an apocalyptic number.

It is an amenable number.

23498209 is a deficient number, since it is larger than the sum of its proper divisors (3356895).

23498209 is an equidigital number, since it uses as much as digits as its factorization.

23498209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3356894.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 23498209 is about 4847.4951263513. The cubic root of 23498209 is about 286.4254390044.

The spelling of 23498209 in words is "twenty-three million, four hundred ninety-eight thousand, two hundred nine".