6983681 has 4 divisors (see below), whose sum is σ = 6989652. Its totient is φ = 6977712.

The previous prime is 6983677. The next prime is 6983699. The reversal of 6983681 is 1863896.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2640625 + 4343056 = 1625^2 + 2084^2 .

It is a cyclic number.

It is not a de Polignac number, because 6983681 - 2² = 6983677 is a prime.

It is a super-2 number, since 2×6983681² = 97543600619522, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6983671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 590 + ... + 3783.

It is an arithmetic number, because the mean of its divisors is an integer number (1747413).

It is a Proth number, since it is equal to 1705 ⋅ 2¹² + 1 and 1705 < 2¹².

Almost surely, 2^6983681 is an apocalyptic number.

It is an amenable number.

6983681 is a deficient number, since it is larger than the sum of its proper divisors (5971).

6983681 is a wasteful number, since it uses less digits than its factorization.

6983681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5970.

The product of its digits is 62208, while the sum is 41.

The square root of 6983681 is about 2642.6655104269. The cubic root of 6983681 is about 191.1443496386.

The spelling of 6983681 in words is "six million, nine hundred eighty-three thousand, six hundred eighty-one".