6864013 has 4 divisors (see below), whose sum is σ = 7392028. Its totient is φ = 6336000.

The previous prime is 6863993. The next prime is 6864019. The reversal of 6864013 is 3104686.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3108169 + 3755844 = 1763^2 + 1938^2 .

It is a cyclic number.

It is not a de Polignac number, because 6864013 - 2⁹ = 6863501 is a prime.

It is a super-2 number, since 2×6864013² = 94229348928338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6864019) 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, 263988 + ... + 264013.

It is an arithmetic number, because the mean of its divisors is an integer number (1848007).

Almost surely, 2^6864013 is an apocalyptic number.

It is an amenable number.

6864013 is a deficient number, since it is larger than the sum of its proper divisors (528015).

6864013 is a wasteful number, since it uses less digits than its factorization.

6864013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528014.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 6864013 is about 2619.9261439972. The cubic root of 6864013 is about 190.0462768164.

Adding to 6864013 its reverse (3104686), we get a palindrome (9968699).

The spelling of 6864013 in words is "six million, eight hundred sixty-four thousand, thirteen".