6863939 has 2 divisors, whose sum is σ = 6863940. Its totient is φ = 6863938.

The previous prime is 6863897. The next prime is 6863953. The reversal of 6863939 is 9393686.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6863939 is a prime.

It is a super-2 number, since 2×6863939² = 94227317191442, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6863939.

It is not a weakly prime, because it can be changed into another prime (6853939) 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 as a sum of consecutive naturals, namely, 3431969 + 3431970.

It is an arithmetic number, because the mean of its divisors is an integer number (3431970).

Almost surely, 2^6863939 is an apocalyptic number.

6863939 is a deficient number, since it is larger than the sum of its proper divisors (1).

6863939 is an equidigital number, since it uses as much as digits as its factorization.

6863939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 209952, while the sum is 44.

The square root of 6863939 is about 2619.9120214236. The cubic root of 6863939 is about 190.0455938595.

The spelling of 6863939 in words is "six million, eight hundred sixty-three thousand, nine hundred thirty-nine".