6394985 has 4 divisors (see below), whose sum is σ = 7673988. Its totient is φ = 5115984.

The previous prime is 6394981. The next prime is 6395047. The reversal of 6394985 is 5894936.

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 4804864 + 1590121 = 2192^2 + 1261^2 .

It is a cyclic number.

It is not a de Polignac number, because 6394985 - 2² = 6394981 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6394981) 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, 639494 + ... + 639503.

It is an arithmetic number, because the mean of its divisors is an integer number (1918497).

Almost surely, 2^6394985 is an apocalyptic number.

It is an amenable number.

6394985 is a deficient number, since it is larger than the sum of its proper divisors (1279003).

6394985 is a wasteful number, since it uses less digits than its factorization.

6394985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279002.

The product of its digits is 233280, while the sum is 44.

The square root of 6394985 is about 2528.8307574846. The cubic root of 6394985 is about 185.6150457389.

The spelling of 6394985 in words is "six million, three hundred ninety-four thousand, nine hundred eighty-five".