8403 has 4 divisors (see below), whose sum is σ = 11208. Its totient is φ = 5600.

The previous prime is 8389. The next prime is 8419. The reversal of 8403 is 3048.

8403 is nontrivially palindromic in base 7.

8403 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 8403 - 2⁴ = 8387 is a prime.

It is a super-2 number, since 2×8403² = 141220818, which contains 22 as substring.

It is a D-number.

8403 is a nontrivial repdigit in base 7.

It is a plaindrome in base 7 and base 9.

It is a nialpdrome in base 7.

It is a zygodrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (8423) 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, 1398 + ... + 1403.

It is an arithmetic number, because the mean of its divisors is an integer number (2802).

2⁸⁴⁰³ is an apocalyptic number.

8403 is a deficient number, since it is larger than the sum of its proper divisors (2805).

8403 is a wasteful number, since it uses less digits than its factorization.

8403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2804.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 8403 is about 91.6678787799. The cubic root of 8403 is about 20.3303468396.

The spelling of 8403 in words is "eight thousand, four hundred three".