97889 has 6 divisors (see below), whose sum is σ = 107730. Its totient is φ = 88880.

The previous prime is 97883. The next prime is 97919. The reversal of 97889 is 98879.

It can be written as a sum of positive squares in only one way, i.e., 94864 + 3025 = 308^2 + 55^2 .

It is not a de Polignac number, because 97889 - 2¹⁶ = 32353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97883) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 284 + ... + 525.

It is an arithmetic number, because the mean of its divisors is an integer number (17955).

2⁹⁷⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

97889 is a deficient number, since it is larger than the sum of its proper divisors (9841).

97889 is a wasteful number, since it uses less digits than its factorization.

97889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831 (or 820 counting only the distinct ones).

The product of its digits is 36288, while the sum is 41.

The square root of 97889 is about 312.8721783732. The cubic root of 97889 is about 46.0869495952.

Subtracting 97889 from its reverse (98879), we obtain a triangular number (990 = T₄₄).

The spelling of 97889 in words is "ninety-seven thousand, eight hundred eighty-nine".