6943985 has 4 divisors (see below), whose sum is σ = 8332788. Its totient is φ = 5555184.

The previous prime is 6943919. The next prime is 6943991. The reversal of 6943985 is 5893496.

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 4669921 + 2274064 = 2161^2 + 1508^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6943985 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 694394 + ... + 694403.

It is an arithmetic number, because the mean of its divisors is an integer number (2083197).

Almost surely, 2^6943985 is an apocalyptic number.

It is an amenable number.

6943985 is a deficient number, since it is larger than the sum of its proper divisors (1388803).

6943985 is a wasteful number, since it uses less digits than its factorization.

6943985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1388802.

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

The square root of 6943985 is about 2635.1442085776. The cubic root of 6943985 is about 190.7814995386.

The spelling of 6943985 in words is "six million, nine hundred forty-three thousand, nine hundred eighty-five".