23887289 has 4 divisors (see below), whose sum is σ = 24059280. Its totient is φ = 23715300.

The previous prime is 23887273. The next prime is 23887291. The reversal of 23887289 is 98278832.

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 23887289 - 2⁴ = 23887273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23881289) 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, 85787 + ... + 86064.

It is an arithmetic number, because the mean of its divisors is an integer number (6014820).

Almost surely, 2^23887289 is an apocalyptic number.

It is an amenable number.

23887289 is a deficient number, since it is larger than the sum of its proper divisors (171991).

23887289 is a wasteful number, since it uses less digits than its factorization.

23887289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171990.

The product of its digits is 387072, while the sum is 47.

The square root of 23887289 is about 4887.4624295231. The cubic root of 23887289 is about 287.9976570347.

The spelling of 23887289 in words is "twenty-three million, eight hundred eighty-seven thousand, two hundred eighty-nine".