2643000839 has 4 divisors (see below), whose sum is σ = 2644846656. Its totient is φ = 2641155024.

The previous prime is 2643000809. The next prime is 2643000847. The reversal of 2643000839 is 9380003462.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2643000839 - 2²⁰ = 2641952263 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2643000799 and 2643000808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2643000809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 920759 + ... + 923624.

It is an arithmetic number, because the mean of its divisors is an integer number (661211664).

Almost surely, 2^2643000839 is an apocalyptic number.

2643000839 is a deficient number, since it is larger than the sum of its proper divisors (1845817).

2643000839 is a wasteful number, since it uses less digits than its factorization.

2643000839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1845816.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 2643000839 is about 51410.1238959799. The cubic root of 2643000839 is about 1382.6081110362.

The spelling of 2643000839 in words is "two billion, six hundred forty-three million, eight hundred thirty-nine", and thus it is an aban number.