1403 has 4 divisors (see below), whose sum is σ = 1488. Its totient is φ = 1320.

The previous prime is 1399. The next prime is 1409. The reversal of 1403 is 3041.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1403 - 2² = 1399 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (1409) 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, 8 + ... + 53.

It is an arithmetic number, because the mean of its divisors is an integer number (372).

2¹⁴⁰³ is an apocalyptic number.

1403 is a deficient number, since it is larger than the sum of its proper divisors (85).

1403 is an equidigital number, since it uses as much as digits as its factorization.

1403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84.

The product of its (nonzero) digits is 12, while the sum is 8.

The square root of 1403 is about 37.4566416007. The cubic root of 1403 is about 11.1948743553.

Multiplying 1403 by its product of nonzero digits (12), we get a triangular number (16836 = T₁₈₃).

Adding to 1403 its reverse (3041), we get a palindrome (4444).

It can be divided in two parts, 1 and 403, that added together give a palindrome (404).

The spelling of 1403 in words is "one thousand, four hundred three", and thus it is an iban number.