983993 has 2 divisors, whose sum is σ = 983994. Its totient is φ = 983992.

The previous prime is 983987. The next prime is 984007. The reversal of 983993 is 399389.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 779689 + 204304 = 883^2 + 452^2 .

It is an emirp because it is prime and its reverse (399389) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 983993 - 2⁶ = 983929 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 983993.

It is not a weakly prime, because it can be changed into another prime (983923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 491996 + 491997.

It is an arithmetic number, because the mean of its divisors is an integer number (491997).

2⁹⁸³⁹⁹³ is an apocalyptic number.

It is an amenable number.

983993 is a deficient number, since it is larger than the sum of its proper divisors (1).

983993 is an equidigital number, since it uses as much as digits as its factorization.

983993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52488, while the sum is 41.

The square root of 983993 is about 991.9642130642. The cubic root of 983993 is about 99.4635608089.

The spelling of 983993 in words is "nine hundred eighty-three thousand, nine hundred ninety-three".