2809089 has 6 divisors (see below), whose sum is σ = 4057586. Its totient is φ = 1872720.

The previous prime is 2809087. The next prime is 2809091. The reversal of 2809089 is 9809082.

It is an interprime number because it is at equal distance from previous prime (2809087) and next prime (2809091).

It can be written as a sum of positive squares in only one way, i.e., 2772225 + 36864 = 1665^2 + 192^2 .

It is not a de Polignac number, because 2809089 - 2¹ = 2809087 is a prime.

It is a Duffinian number.

2809089 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2809087) 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, 156052 + ... + 156069.

2^2809089 is an apocalyptic number.

It is an amenable number.

2809089 is a deficient number, since it is larger than the sum of its proper divisors (1248497).

2809089 is a wasteful number, since it uses less digits than its factorization.

2809089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312127 (or 312124 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 2809089 is about 1676.0337108782. The cubic root of 2809089 is about 141.0983168226.

The spelling of 2809089 in words is "two million, eight hundred nine thousand, eighty-nine".