983661 has 16 divisors (see below), whose sum is σ = 1548288. Its totient is φ = 543600.

The previous prime is 983659. The next prime is 983699. The reversal of 983661 is 166389.

983661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 983661 - 2¹ = 983659 is a prime.

It is a Curzon number.

983661 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (983261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105 + ... + 1406.

It is an arithmetic number, because the mean of its divisors is an integer number (96768).

2⁹⁸³⁶⁶¹ is an apocalyptic number.

It is an amenable number.

983661 is a deficient number, since it is larger than the sum of its proper divisors (564627).

983661 is a wasteful number, since it uses less digits than its factorization.

983661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1552.

The product of its digits is 7776, while the sum is 33.

The square root of 983661 is about 991.7968541995. The cubic root of 983661 is about 99.4523731898.

The spelling of 983661 in words is "nine hundred eighty-three thousand, six hundred sixty-one".