6875639 has 4 divisors (see below), whose sum is σ = 7112760. Its totient is φ = 6638520.

The previous prime is 6875623. The next prime is 6875717. The reversal of 6875639 is 9365786.

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 6875639 - 2⁴ = 6875623 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6875639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6875839) 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, 118517 + ... + 118574.

It is an arithmetic number, because the mean of its divisors is an integer number (1778190).

Almost surely, 2^6875639 is an apocalyptic number.

6875639 is a deficient number, since it is larger than the sum of its proper divisors (237121).

6875639 is a wasteful number, since it uses less digits than its factorization.

6875639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237120.

The product of its digits is 272160, while the sum is 44.

The square root of 6875639 is about 2622.1439701130. The cubic root of 6875639 is about 190.1535139746.

The spelling of 6875639 in words is "six million, eight hundred seventy-five thousand, six hundred thirty-nine".