23663389 has 4 divisors (see below), whose sum is σ = 24692256. Its totient is φ = 22634524.

The previous prime is 23663369. The next prime is 23663407. The reversal of 23663389 is 98336632.

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 23663389 - 2¹³ = 23655197 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 (23663309) 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, 514399 + ... + 514444.

It is an arithmetic number, because the mean of its divisors is an integer number (6173064).

Almost surely, 2^23663389 is an apocalyptic number.

It is an amenable number.

23663389 is a deficient number, since it is larger than the sum of its proper divisors (1028867).

23663389 is a wasteful number, since it uses less digits than its factorization.

23663389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028866.

The product of its digits is 139968, while the sum is 40.

The square root of 23663389 is about 4864.5029550818. The cubic root of 23663389 is about 287.0950123897.

The spelling of 23663389 in words is "twenty-three million, six hundred sixty-three thousand, three hundred eighty-nine".