7403 has 4 divisors (see below), whose sum is σ = 8088. Its totient is φ = 6720.

The previous prime is 7393. The next prime is 7411. The reversal of 7403 is 3047.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3047 = 11 ⋅277.

It is a cyclic number.

It is not a de Polignac number, because 7403 - 2¹⁰ = 6379 is a prime.

It is a Duffinian number.

It is a plaindrome in base 9 and base 14.

It is not an unprimeable number, because it can be changed into a prime (7433) 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, 326 + ... + 347.

It is an arithmetic number, because the mean of its divisors is an integer number (2022).

2⁷⁴⁰³ is an apocalyptic number.

7403 is a deficient number, since it is larger than the sum of its proper divisors (685).

7403 is a wasteful number, since it uses less digits than its factorization.

7403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684.

The product of its (nonzero) digits is 84, while the sum is 14.

The square root of 7403 is about 86.0406880493. The cubic root of 7403 is about 19.4895846198.

Subtracting from 7403 its reverse (3047), we obtain a square (4356 = 66²).

The spelling of 7403 in words is "seven thousand, four hundred three", and thus it is an iban number.