6864781 has 8 divisors (see below), whose sum is σ = 8558784. Its totient is φ = 5349120.

The previous prime is 6864779. The next prime is 6864811. The reversal of 6864781 is 1874686.

6864781 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6864781 - 2¹ = 6864779 is a prime.

It is a super-2 number, since 2×6864781² = 94250436355922, 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 (6864181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44500 + ... + 44653.

It is an arithmetic number, because the mean of its divisors is an integer number (1069848).

Almost surely, 2^6864781 is an apocalyptic number.

It is an amenable number.

6864781 is a deficient number, since it is larger than the sum of its proper divisors (1694003).

6864781 is a wasteful number, since it uses less digits than its factorization.

6864781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89171.

The product of its digits is 64512, while the sum is 40.

The square root of 6864781 is about 2620.0727089148. The cubic root of 6864781 is about 190.0533645117.

The spelling of 6864781 in words is "six million, eight hundred sixty-four thousand, seven hundred eighty-one".