100089 has 16 divisors (see below), whose sum is σ = 162240. Its totient is φ = 60480.

The previous prime is 100069. The next prime is 100103. The reversal of 100089 is 980001.

It is not a de Polignac number, because 100089 - 2⁵ = 100057 is a prime.

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (100019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129 + ... + 465.

It is an arithmetic number, because the mean of its divisors is an integer number (10140).

2¹⁰⁰⁰⁸⁹ is an apocalyptic number.

It is an amenable number.

100089 is a deficient number, since it is larger than the sum of its proper divisors (62151).

100089 is a wasteful number, since it uses less digits than its factorization.

100089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357 (or 351 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 100089 is about 316.3684560761. The cubic root of 100089 is about 46.4296542999.

It can be divided in two parts, 1000 and 89, that added together give a square (1089 = 33²).

The spelling of 100089 in words is "one hundred thousand, eighty-nine".