23909691 has 16 divisors (see below), whose sum is σ = 34917120. Its totient is φ = 14462880.

The previous prime is 23909689. The next prime is 23909707. The reversal of 23909691 is 19690932.

It is a happy number.

It is not a de Polignac number, because 23909691 - 2¹ = 23909689 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (23909681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2895 + ... + 7496.

It is an arithmetic number, because the mean of its divisors is an integer number (2182320).

Almost surely, 2^23909691 is an apocalyptic number.

23909691 is a deficient number, since it is larger than the sum of its proper divisors (11007429).

23909691 is a wasteful number, since it uses less digits than its factorization.

23909691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10466.

The product of its (nonzero) digits is 26244, while the sum is 39.

The square root of 23909691 is about 4889.7536747775. The cubic root of 23909691 is about 288.0876589838.

The spelling of 23909691 in words is "twenty-three million, nine hundred nine thousand, six hundred ninety-one".