23685409 has 8 divisors (see below), whose sum is σ = 26095680. Its totient is φ = 21318000.

The previous prime is 23685397. The next prime is 23685421. The reversal of 23685409 is 90458632.

It is an interprime number because it is at equal distance from previous prime (23685397) and next prime (23685421).

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

It is not a de Polignac number, because 23685409 - 2⁷ = 23685281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23682409) 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, 9549 + ... + 11770.

It is an arithmetic number, because the mean of its divisors is an integer number (3261960).

Almost surely, 2^23685409 is an apocalyptic number.

It is an amenable number.

23685409 is a deficient number, since it is larger than the sum of its proper divisors (2410271).

23685409 is a wasteful number, since it uses less digits than its factorization.

23685409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21431.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 23685409 is about 4866.7657638313. The cubic root of 23685409 is about 287.1840370043.

It can be divided in two parts, 2368 and 5409, that added together give a palindrome (7777).

The spelling of 23685409 in words is "twenty-three million, six hundred eighty-five thousand, four hundred nine".