2889309 has 4 divisors (see below), whose sum is σ = 3852416. Its totient is φ = 1926204.

The previous prime is 2889287. The next prime is 2889317. The reversal of 2889309 is 9039882.

2889309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 2889309 - 2⁵ = 2889277 is a prime.

It is a D-number.

It is a Duffinian number.

2889309 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2889319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 481549 + ... + 481554.

It is an arithmetic number, because the mean of its divisors is an integer number (963104).

2^2889309 is an apocalyptic number.

It is an amenable number.

2889309 is a deficient number, since it is larger than the sum of its proper divisors (963107).

2889309 is an equidigital number, since it uses as much as digits as its factorization.

2889309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 963106.

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 2889309 is about 1699.7967525560. The cubic root of 2889309 is about 142.4288595350.

The spelling of 2889309 in words is "two million, eight hundred eighty-nine thousand, three hundred nine".