23640717 has 4 divisors (see below), whose sum is σ = 31520960. Its totient is φ = 15760476.

The previous prime is 23640691. The next prime is 23640737. The reversal of 23640717 is 71704632.

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 not a de Polignac number, because 23640717 - 2²⁴ = 6863501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23640737) 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, 3940117 + ... + 3940122.

It is an arithmetic number, because the mean of its divisors is an integer number (7880240).

Almost surely, 2^23640717 is an apocalyptic number.

It is an amenable number.

23640717 is a deficient number, since it is larger than the sum of its proper divisors (7880243).

23640717 is an equidigital number, since it uses as much as digits as its factorization.

23640717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7880242.

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 23640717 is about 4862.1720454957. The cubic root of 23640717 is about 287.0032940817.

The spelling of 23640717 in words is "twenty-three million, six hundred forty thousand, seven hundred seventeen".