100020089 has 16 divisors (see below), whose sum is σ = 110568192. Its totient is φ = 89900928.

The previous prime is 100020023. The next prime is 100020103. The reversal of 100020089 is 980020001.

It is a de Polignac number, because none of the positive numbers 2^k-100020089 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 100020089.

It is not an unprimeable number, because it can be changed into a prime (100020889) 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, 190982 + ... + 191504.

It is an arithmetic number, because the mean of its divisors is an integer number (6910512).

Almost surely, 2^100020089 is an apocalyptic number.

It is an amenable number.

100020089 is a deficient number, since it is larger than the sum of its proper divisors (10548103).

100020089 is a wasteful number, since it uses less digits than its factorization.

100020089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 100020089 is about 10001.0043995591. The cubic root of 100020089 is about 464.1899629062.

The spelling of 100020089 in words is "one hundred million, twenty thousand, eighty-nine".