983681 has 4 divisors (see below), whose sum is σ = 985812. Its totient is φ = 981552.

The previous prime is 983659. The next prime is 983699. The reversal of 983681 is 186389.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 186389 = 7 ⋅26627.

It can be written as a sum of positive squares in 2 ways, for example, as 970225 + 13456 = 985^2 + 116^2 .

It is a cyclic number.

It is not a de Polignac number, because 983681 - 2⁶ = 983617 is a prime.

It is a super-2 number, since 2×983681² = 1935256619522, which contains 22 as substring.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 983681.

It is not an unprimeable number, because it can be changed into a prime (983581) 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, 50 + ... + 1403.

It is an arithmetic number, because the mean of its divisors is an integer number (246453).

2⁹⁸³⁶⁸¹ is an apocalyptic number.

It is an amenable number.

983681 is a deficient number, since it is larger than the sum of its proper divisors (2131).

983681 is a wasteful number, since it uses less digits than its factorization.

983681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2130.

The product of its digits is 10368, while the sum is 35.

The square root of 983681 is about 991.8069368582. The cubic root of 983681 is about 99.4530472140.

The spelling of 983681 in words is "nine hundred eighty-three thousand, six hundred eighty-one".