402403 has 2 divisors, whose sum is σ = 402404. Its totient is φ = 402402.

The previous prime is 402383. The next prime is 402419. The reversal of 402403 is 304204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 402403 - 2⁵ = 402371 is a prime.

It is not a weakly prime, because it can be changed into another prime (402443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201201 + 201202.

It is an arithmetic number, because the mean of its divisors is an integer number (201202).

2⁴⁰²⁴⁰³ is an apocalyptic number.

402403 is a deficient number, since it is larger than the sum of its proper divisors (1).

402403 is an equidigital number, since it uses as much as digits as its factorization.

402403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 402403 is about 634.3524257067. The cubic root of 402403 is about 73.8278809567.

Adding to 402403 its reverse (304204), we get a palindrome (706607).

The spelling of 402403 in words is "four hundred two thousand, four hundred three", and thus it is an iban number.