23217009 has 8 divisors (see below), whose sum is σ = 31329312. Its totient is φ = 15291360.

The previous prime is 23216989. The next prime is 23217011. The reversal of 23217009 is 90071232.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23217009 - 2⁷ = 23216881 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 23217009.

It is not an unprimeable number, because it can be changed into a prime (23217049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46372 + ... + 46869.

It is an arithmetic number, because the mean of its divisors is an integer number (3916164).

Almost surely, 2^23217009 is an apocalyptic number.

It is an amenable number.

23217009 is a deficient number, since it is larger than the sum of its proper divisors (8112303).

23217009 is an equidigital number, since it uses as much as digits as its factorization.

23217009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93327.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 23217009 is about 4818.4031587239. The cubic root of 23217009 is about 285.2783123097.

The spelling of 23217009 in words is "twenty-three million, two hundred seventeen thousand, nine".