993403 has 4 divisors (see below), whose sum is σ = 995400. Its totient is φ = 991408.

The previous prime is 993401. The next prime is 993407. The reversal of 993403 is 304399.

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 993403 - 2¹ = 993401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (993401) 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, 423 + ... + 1471.

It is an arithmetic number, because the mean of its divisors is an integer number (248850).

2⁹⁹³⁴⁰³ is an apocalyptic number.

993403 is a deficient number, since it is larger than the sum of its proper divisors (1997).

993403 is a wasteful number, since it uses less digits than its factorization.

993403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1996.

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 993403 is about 996.6960419305. The cubic root of 993403 is about 99.7796146598.

The spelling of 993403 in words is "nine hundred ninety-three thousand, four hundred three".