100219989 has 4 divisors (see below), whose sum is σ = 133626656. Its totient is φ = 66813324.

The previous prime is 100219967. The next prime is 100220009. The reversal of 100219989 is 989912001.

It is a happy number.

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.

It is not a de Polignac number, because 100219989 - 2⁹ = 100219477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100219919) 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, 16703329 + ... + 16703334.

It is an arithmetic number, because the mean of its divisors is an integer number (33406664).

Almost surely, 2^100219989 is an apocalyptic number.

It is an amenable number.

100219989 is a deficient number, since it is larger than the sum of its proper divisors (33406667).

100219989 is an equidigital number, since it uses as much as digits as its factorization.

100219989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33406666.

The product of its (nonzero) digits is 11664, while the sum is 39.

The square root of 100219989 is about 10010.9934072499. The cubic root of 100219989 is about 464.4990002385.

The spelling of 100219989 in words is "one hundred million, two hundred nineteen thousand, nine hundred eighty-nine".