683986 has 4 divisors (see below), whose sum is σ = 1025982. Its totient is φ = 341992.

The previous prime is 683983. The next prime is 684007. The reversal of 683986 is 689386.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 689386 = 2 ⋅344693.

It can be written as a sum of positive squares in only one way, i.e., 670761 + 13225 = 819^2 + 115^2 .

It is not an unprimeable number, because it can be changed into a prime (683983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170995 + ... + 170998.

2⁶⁸³⁹⁸⁶ is an apocalyptic number.

683986 is a deficient number, since it is larger than the sum of its proper divisors (341996).

683986 is a wasteful number, since it uses less digits than its factorization.

683986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341995.

The product of its digits is 62208, while the sum is 40.

The square root of 683986 is about 827.0344611925. The cubic root of 683986 is about 88.1080800136.

The spelling of 683986 in words is "six hundred eighty-three thousand, nine hundred eighty-six".