983689 has 4 divisors (see below), whose sum is σ = 1124224. Its totient is φ = 843156.

The previous prime is 983659. The next prime is 983699. The reversal of 983689 is 986389.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 983689 - 2¹³ = 975497 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (983659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70257 + ... + 70270.

It is an arithmetic number, because the mean of its divisors is an integer number (281056).

2⁹⁸³⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

983689 is a deficient number, since it is larger than the sum of its proper divisors (140535).

983689 is a wasteful number, since it uses less digits than its factorization.

983689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140534.

The product of its digits is 93312, while the sum is 43.

The square root of 983689 is about 991.8109698930. The cubic root of 983689 is about 99.4533168211.

The spelling of 983689 in words is "nine hundred eighty-three thousand, six hundred eighty-nine".