2890009 has 4 divisors (see below), whose sum is σ = 2896740. Its totient is φ = 2883280.

The previous prime is 2890003. The next prime is 2890031. The reversal of 2890009 is 9000982.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9000982 = 2 ⋅4500491.

It can be written as a sum of positive squares in 2 ways, for example, as 921600 + 1968409 = 960^2 + 1403^2 .

It is a cyclic number.

It is not a de Polignac number, because 2890009 - 2³ = 2890001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2890001) 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, 2674 + ... + 3595.

It is an arithmetic number, because the mean of its divisors is an integer number (724185).

2^2890009 is an apocalyptic number.

It is an amenable number.

2890009 is a deficient number, since it is larger than the sum of its proper divisors (6731).

2890009 is an equidigital number, since it uses as much as digits as its factorization.

2890009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6730.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 2890009 is about 1700.0026470568. The cubic root of 2890009 is about 142.4403608030.

It can be divided in two parts, 28 and 90009, that multiplied together give a palindrome (2520252).

The spelling of 2890009 in words is "two million, eight hundred ninety thousand, nine".