89997 has 8 divisors (see below), whose sum is σ = 121440. Its totient is φ = 59280.

The previous prime is 89989. The next prime is 90001. The reversal of 89997 is 79998.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 89997 - 2³ = 89989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 279 + ... + 507.

It is an arithmetic number, because the mean of its divisors is an integer number (15180).

2⁸⁹⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

89997 is a deficient number, since it is larger than the sum of its proper divisors (31443).

89997 is a wasteful number, since it uses less digits than its factorization.

89997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363.

The product of its digits is 40824, while the sum is 42.

The square root of 89997 is about 299.9949999583. The cubic root of 89997 is about 44.8135495262.

Subtracting from 89997 its reverse (79998), we obtain a palindrome (9999).

The spelling of 89997 in words is "eighty-nine thousand, nine hundred ninety-seven".