23697409 has 4 divisors (see below), whose sum is σ = 24099120. Its totient is φ = 23295700.

The previous prime is 23697403. The next prime is 23697433. The reversal of 23697409 is 90479632.

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 23697409 - 2⁷ = 23697281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23697403) 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, 200767 + ... + 200884.

It is an arithmetic number, because the mean of its divisors is an integer number (6024780).

Almost surely, 2^23697409 is an apocalyptic number.

It is an amenable number.

23697409 is a deficient number, since it is larger than the sum of its proper divisors (401711).

23697409 is an equidigital number, since it uses as much as digits as its factorization.

23697409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401710.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 23697409 is about 4867.9984593260. The cubic root of 23697409 is about 287.2325285547.

The spelling of 23697409 in words is "twenty-three million, six hundred ninety-seven thousand, four hundred nine".