2989809 has 6 divisors (see below), whose sum is σ = 4318626. Its totient is φ = 1993200.

The previous prime is 2989799. The next prime is 2989823. The reversal of 2989809 is 9089892.

It can be written as a sum of positive squares in only one way, i.e., 2039184 + 950625 = 1428^2 + 975^2 .

It is not a de Polignac number, because 2989809 - 2¹² = 2985713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2989849) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 166092 + ... + 166109.

It is an arithmetic number, because the mean of its divisors is an integer number (719771).

2^2989809 is an apocalyptic number.

It is an amenable number.

2989809 is a deficient number, since it is larger than the sum of its proper divisors (1328817).

2989809 is a wasteful number, since it uses less digits than its factorization.

2989809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332207 (or 332204 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 2989809 is about 1729.1064166210. The cubic root of 2989809 is about 144.0614610324.

The spelling of 2989809 in words is "two million, nine hundred eighty-nine thousand, eight hundred nine".