6863139 has 6 divisors (see below), whose sum is σ = 9913436. Its totient is φ = 4575420.

The previous prime is 6863137. The next prime is 6863141. The reversal of 6863139 is 9313686.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6863137) and next prime (6863141).

It is not a de Polignac number, because 6863139 - 2¹ = 6863137 is a prime.

It is a Duffinian number.

6863139 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6863137) 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 5 ways as a sum of consecutive naturals, for example, 381277 + ... + 381294.

Almost surely, 2^6863139 is an apocalyptic number.

6863139 is a deficient number, since it is larger than the sum of its proper divisors (3050297).

6863139 is a wasteful number, since it uses less digits than its factorization.

6863139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762577 (or 762574 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 6863139 is about 2619.7593400921. The cubic root of 6863139 is about 190.0382102284.

The spelling of 6863139 in words is "six million, eight hundred sixty-three thousand, one hundred thirty-nine".