6822639 has 6 divisors (see below), whose sum is σ = 9854936. Its totient is φ = 4548420.

The previous prime is 6822631. The next prime is 6822659. The reversal of 6822639 is 9362286.

It is not a de Polignac number, because 6822639 - 2³ = 6822631 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6822631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 379027 + ... + 379044.

Almost surely, 2^6822639 is an apocalyptic number.

6822639 is a deficient number, since it is larger than the sum of its proper divisors (3032297).

6822639 is a wasteful number, since it uses less digits than its factorization.

6822639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758077 (or 758074 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 6822639 is about 2612.0181852353. The cubic root of 6822639 is about 189.6636616590.

It can be divided in two parts, 68226 and 39, that added together give a triangular number (68265 = T₃₆₉).

The spelling of 6822639 in words is "six million, eight hundred twenty-two thousand, six hundred thirty-nine".