6999985 has 8 divisors (see below), whose sum is σ = 8464896. Its totient is φ = 5556720.

The previous prime is 6999973. The next prime is 6999989. The reversal of 6999985 is 5899996.

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

It is not a de Polignac number, because 6999985 - 2⁷ = 6999857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6999989) 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, 4689 + ... + 5998.

It is an arithmetic number, because the mean of its divisors is an integer number (1058112).

Almost surely, 2^6999985 is an apocalyptic number.

It is an amenable number.

6999985 is a deficient number, since it is larger than the sum of its proper divisors (1464911).

6999985 is a wasteful number, since it uses less digits than its factorization.

6999985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10823.

The product of its digits is 1574640, while the sum is 55.

The square root of 6999985 is about 2645.7484763295. The cubic root of 6999985 is about 191.2929816392.

The spelling of 6999985 in words is "six million, nine hundred ninety-nine thousand, nine hundred eighty-five".