6723985 has 4 divisors (see below), whose sum is σ = 8068788. Its totient is φ = 5379184.

The previous prime is 6723979. The next prime is 6724007. The reversal of 6723985 is 5893276.

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 1710864 + 5013121 = 1308^2 + 2239^2 .

It is a cyclic number.

It is not a de Polignac number, because 6723985 - 2²¹ = 4626833 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 672394 + ... + 672403.

It is an arithmetic number, because the mean of its divisors is an integer number (2017197).

Almost surely, 2^6723985 is an apocalyptic number.

It is an amenable number.

6723985 is a deficient number, since it is larger than the sum of its proper divisors (1344803).

6723985 is a wasteful number, since it uses less digits than its factorization.

6723985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1344802.

The product of its digits is 90720, while the sum is 40.

The square root of 6723985 is about 2593.0647890093. The cubic root of 6723985 is about 188.7450534499.

The spelling of 6723985 in words is "six million, seven hundred twenty-three thousand, nine hundred eighty-five".