6864637 has 8 divisors (see below), whose sum is σ = 7459704. Its totient is φ = 6279168.

The previous prime is 6864631. The next prime is 6864653. The reversal of 6864637 is 7364686.

It can be written as a sum of positive squares in 4 ways, for example, as 177241 + 6687396 = 421^2 + 2586^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 6864637 - 2³ = 6864629 is a prime.

It is a super-2 number, since 2×6864637² = 94246482283538, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 6864637.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6864631) 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, 868 + ... + 3805.

It is an arithmetic number, because the mean of its divisors is an integer number (932463).

Almost surely, 2^6864637 is an apocalyptic number.

It is an amenable number.

6864637 is a deficient number, since it is larger than the sum of its proper divisors (595067).

6864637 is a wasteful number, since it uses less digits than its factorization.

6864637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4799.

The product of its digits is 145152, while the sum is 40.

The square root of 6864637 is about 2620.0452286172. The cubic root of 6864637 is about 190.0520356091.

The spelling of 6864637 in words is "six million, eight hundred sixty-four thousand, six hundred thirty-seven".