993903 has 4 divisors (see below), whose sum is σ = 1325208. Its totient is φ = 662600.

The previous prime is 993893. The next prime is 993907. The reversal of 993903 is 309399.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 993903 - 2⁴ = 993887 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (993907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165648 + ... + 165653.

It is an arithmetic number, because the mean of its divisors is an integer number (331302).

2⁹⁹³⁹⁰³ is an apocalyptic number.

993903 is a deficient number, since it is larger than the sum of its proper divisors (331305).

993903 is a wasteful number, since it uses less digits than its factorization.

993903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331304.

The product of its (nonzero) digits is 6561, while the sum is 33.

The square root of 993903 is about 996.9468391043. The cubic root of 993903 is about 99.7963522240.

The spelling of 993903 in words is "nine hundred ninety-three thousand, nine hundred three".