30403 has 2 divisors, whose sum is σ = 30404. Its totient is φ = 30402.

The previous prime is 30391. The next prime is 30427.

30403 is nontrivially palindromic in base 10.

It is a weak prime.

It is a palprime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30403 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30403.

It is not a weakly prime, because it can be changed into another prime (30493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15201 + 15202.

It is an arithmetic number, because the mean of its divisors is an integer number (15202).

2³⁰⁴⁰³ is an apocalyptic number.

30403 is a deficient number, since it is larger than the sum of its proper divisors (1).

30403 is an equidigital number, since it uses as much as digits as its factorization.

30403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 10.

The square root of 30403 is about 174.3645606194. The cubic root of 30403 is about 31.2108416190.

It can be divided in two parts, 30 and 403, that multiplied together give a triangular number (12090 = T₁₅₅).

The spelling of 30403 in words is "thirty thousand, four hundred three".