2108989 has 4 divisors (see below), whose sum is σ = 2112156. Its totient is φ = 2105824.

The previous prime is 2108987. The next prime is 2108993. The reversal of 2108989 is 9898012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1664100 + 444889 = 1290^2 + 667^2 .

It is a cyclic number.

It is not a de Polignac number, because 2108989 - 2¹ = 2108987 is a prime.

It is a Duffinian number.

2108989 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2108983) 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, 154 + ... + 2059.

It is an arithmetic number, because the mean of its divisors is an integer number (528039).

2^2108989 is an apocalyptic number.

It is an amenable number.

2108989 is a deficient number, since it is larger than the sum of its proper divisors (3167).

2108989 is an equidigital number, since it uses as much as digits as its factorization.

2108989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3166.

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 2108989 is about 1452.2358623860. The cubic root of 2108989 is about 128.2403727002.

The spelling of 2108989 in words is "two million, one hundred eight thousand, nine hundred eighty-nine".