2403 has 8 divisors (see below), whose sum is σ = 3600. Its totient is φ = 1584.

The previous prime is 2399. The next prime is 2411. The reversal of 2403 is 3042.

Adding to 2403 its reverse (3042), we get a palindrome (5445).

It can be divided in two parts, 240 and 3, that added together give a 5-th power (243 = 3^{5}).

2403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

2403 is an esthetic number in base 8, because in such base its adjacent digits differ by 1.

It is not a de Polignac number, because 2403 - 2^{2} = 2399 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

2403 is a lucky number.

It is a plaindrome in base 13.

It is a nialpdrome in base 15 and base 16.

It is not an unprimeable number, because it can be changed into a prime (2423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18 + ... + 71.

It is an arithmetic number, because the mean of its divisors is an integer number (450).

2^{2403} is an apocalyptic number.

2403 is a deficient number, since it is larger than the sum of its proper divisors (1197).

2403 is an equidigital number, since it uses as much as digits as its factorization.

2403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98 (or 92 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 9.

The square root of 2403 is about 49.0204039151. The cubic root of 2403 is about 13.3942352868.

The spelling of 2403 in words is "two thousand, four hundred three", and thus it is an iban number.

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