23889661 has 4 divisors (see below), whose sum is σ = 23944032. Its totient is φ = 23835292.

The previous prime is 23889659. The next prime is 23889667. The reversal of 23889661 is 16698832.

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 a cyclic number.

It is not a de Polignac number, because 23889661 - 2¹ = 23889659 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 (23889667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26521 + ... + 27406.

It is an arithmetic number, because the mean of its divisors is an integer number (5986008).

Almost surely, 2^23889661 is an apocalyptic number.

It is an amenable number.

23889661 is a deficient number, since it is larger than the sum of its proper divisors (54371).

23889661 is an equidigital number, since it uses as much as digits as its factorization.

23889661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54370.

The product of its digits is 124416, while the sum is 43.

The square root of 23889661 is about 4887.7050852113. The cubic root of 23889661 is about 288.0071894103.

The spelling of 23889661 in words is "twenty-three million, eight hundred eighty-nine thousand, six hundred sixty-one".