88889 has 4 divisors (see below), whose sum is σ = 89856. Its totient is φ = 87924.

The previous prime is 88883. The next prime is 88897. The reversal of 88889 is 98888.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 88889 - 2⁴ = 88873 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88883) 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, 329 + ... + 534.

It is an arithmetic number, because the mean of its divisors is an integer number (22464).

2⁸⁸⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

88889 is a deficient number, since it is larger than the sum of its proper divisors (967).

88889 is a wasteful number, since it uses less digits than its factorization.

88889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 966.

The product of its digits is 36864, while the sum is 41.

The square root of 88889 is about 298.1425833389. The cubic root of 88889 is about 44.6288819342.

Subtracting from 88889 its product of digits (36864), we obtain a palindrome (52025).

Subtracting 88889 from its reverse (98888), we obtain a palindrome (9999).

The spelling of 88889 in words is "eighty-eight thousand, eight hundred eighty-nine".