423403 has 2 divisors, whose sum is σ = 423404. Its totient is φ = 423402.

The previous prime is 423389. The next prime is 423413. The reversal of 423403 is 304324.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423403 is a prime.

It is not a weakly prime, because it can be changed into another prime (423413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211701 + 211702.

It is an arithmetic number, because the mean of its divisors is an integer number (211702).

2⁴²³⁴⁰³ is an apocalyptic number.

423403 is a deficient number, since it is larger than the sum of its proper divisors (1).

423403 is an equidigital number, since it uses as much as digits as its factorization.

423403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 423403 is about 650.6942446341. The cubic root of 423403 is about 75.0904390480.

Adding to 423403 its reverse (304324), we get a palindrome (727727).

The spelling of 423403 in words is "four hundred twenty-three thousand, four hundred three", and thus it is an iban number.