983521 has 16 divisors (see below), whose sum is σ = 1254528. Its totient is φ = 748800.

The previous prime is 983519. The next prime is 983527. The reversal of 983521 is 125389.

983521 = 294² + 295² + ... + 304².

It is a cyclic number.

It is not a de Polignac number, because 983521 - 2¹ = 983519 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 983521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (983527) 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, 3961 + ... + 4201.

It is an arithmetic number, because the mean of its divisors is an integer number (78408).

2⁹⁸³⁵²¹ is an apocalyptic number.

It is an amenable number.

983521 is a deficient number, since it is larger than the sum of its proper divisors (271007).

983521 is a wasteful number, since it uses less digits than its factorization.

983521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312.

The product of its digits is 2160, while the sum is 28.

The square root of 983521 is about 991.7262727184. The cubic root of 983521 is about 99.4476547645.

It can be divided in two parts, 9 and 83521, that multiplied together give a square (751689 = 867²).

The spelling of 983521 in words is "nine hundred eighty-three thousand, five hundred twenty-one".