993983 has 2 divisors, whose sum is σ = 993984. Its totient is φ = 993982.

The previous prime is 993977. The next prime is 993997. The reversal of 993983 is 389399.

It is a weak prime.

It is an emirp because it is prime and its reverse (389399) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 993983 - 2⁶ = 993919 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 993983.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 993983.

It is not a weakly prime, because it can be changed into another prime (993913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496991 + 496992.

It is an arithmetic number, because the mean of its divisors is an integer number (496992).

2⁹⁹³⁹⁸³ is an apocalyptic number.

993983 is a deficient number, since it is larger than the sum of its proper divisors (1).

993983 is an equidigital number, since it uses as much as digits as its factorization.

993983 is an evil number, because the sum of its binary digits is even.

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

The square root of 993983 is about 996.9869607974. The cubic root of 993983 is about 99.7990297133.

The spelling of 993983 in words is "nine hundred ninety-three thousand, nine hundred eighty-three".