6873639 has 4 divisors (see below), whose sum is σ = 9164856. Its totient is φ = 4582424.

The previous prime is 6873613. The next prime is 6873641. The reversal of 6873639 is 9363786.

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 6873639 - 2¹² = 6869543 is a prime.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 6873639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6871639) 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, 1145604 + ... + 1145609.

It is an arithmetic number, because the mean of its divisors is an integer number (2291214).

Almost surely, 2^6873639 is an apocalyptic number.

6873639 is a deficient number, since it is larger than the sum of its proper divisors (2291217).

6873639 is a wasteful number, since it uses less digits than its factorization.

6873639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2291216.

The product of its digits is 163296, while the sum is 42.

The square root of 6873639 is about 2621.7625750628. The cubic root of 6873639 is about 190.1350747717.

The spelling of 6873639 in words is "six million, eight hundred seventy-three thousand, six hundred thirty-nine".