23698609 has 4 divisors (see below), whose sum is σ = 25853040. Its totient is φ = 21544180.

The previous prime is 23698583. The next prime is 23698613. The reversal of 23698609 is 90689632.

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 23698609 - 2⁹ = 23698097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23698639) 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, 1077199 + ... + 1077220.

It is an arithmetic number, because the mean of its divisors is an integer number (6463260).

Almost surely, 2^23698609 is an apocalyptic number.

It is an amenable number.

23698609 is a deficient number, since it is larger than the sum of its proper divisors (2154431).

23698609 is a wasteful number, since it uses less digits than its factorization.

23698609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2154430.

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 23698609 is about 4868.1217117077. The cubic root of 23698609 is about 287.2373768093.

The spelling of 23698609 in words is "twenty-three million, six hundred ninety-eight thousand, six hundred nine".