23868509 has 8 divisors (see below), whose sum is σ = 27741120. Its totient is φ = 20111616.

The previous prime is 23868491. The next prime is 23868511. The reversal of 23868509 is 90586832.

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

It is a de Polignac number, because none of the positive numbers 2^k-23868509 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 (23868529) 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 7 ways as a sum of consecutive naturals, for example, 28484 + ... + 29309.

It is an arithmetic number, because the mean of its divisors is an integer number (3467640).

Almost surely, 2^23868509 is an apocalyptic number.

It is an amenable number.

23868509 is a deficient number, since it is larger than the sum of its proper divisors (3872611).

23868509 is an equidigital number, since it uses as much as digits as its factorization.

23868509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57859.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 23868509 is about 4885.5408093680. The cubic root of 23868509 is about 287.9221634110.

The spelling of 23868509 in words is "twenty-three million, eight hundred sixty-eight thousand, five hundred nine".