2199989 has 4 divisors (see below), whose sum is σ = 2400000. Its totient is φ = 1999980.

The previous prime is 2199979. The next prime is 2200013. The reversal of 2199989 is 9899912.

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 a cyclic number.

It is not a de Polignac number, because 2199989 - 2²⁰ = 1151413 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 (2199959) 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, 99989 + ... + 100010.

It is an arithmetic number, because the mean of its divisors is an integer number (600000).

2^2199989 is an apocalyptic number.

It is an amenable number.

2199989 is a deficient number, since it is larger than the sum of its proper divisors (200011).

2199989 is a wasteful number, since it uses less digits than its factorization.

2199989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200010.

The product of its digits is 104976, while the sum is 47.

The square root of 2199989 is about 1483.2359893153. The cubic root of 2199989 is about 130.0589279195.

It can be divided in two parts, 2 and 199989, that added together give a palindrome (199991).

The spelling of 2199989 in words is "two million, one hundred ninety-nine thousand, nine hundred eighty-nine".