2843989 has 4 divisors (see below), whose sum is σ = 2849056. Its totient is φ = 2838924.

The previous prime is 2843987. The next prime is 2843993. The reversal of 2843989 is 9893482.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9893482 = 2 ⋅4946741.

It is a cyclic number.

It is not a de Polignac number, because 2843989 - 2¹ = 2843987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2843987) 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, 1569 + ... + 2854.

It is an arithmetic number, because the mean of its divisors is an integer number (712264).

2^2843989 is an apocalyptic number.

It is an amenable number.

2843989 is a deficient number, since it is larger than the sum of its proper divisors (5067).

2843989 is an equidigital number, since it uses as much as digits as its factorization.

2843989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5066.

The product of its digits is 124416, while the sum is 43.

The square root of 2843989 is about 1686.4130573498. The cubic root of 2843989 is about 141.6802466029.

The spelling of 2843989 in words is "two million, eight hundred forty-three thousand, nine hundred eighty-nine".