406403 has 2 divisors, whose sum is σ = 406404. Its totient is φ = 406402.

The previous prime is 406397. The next prime is 406423. The reversal of 406403 is 304604.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 406403 - 2⁶ = 406339 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a zygodrome in base 2.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 406403.

It is not a weakly prime, because it can be changed into another prime (406423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203201 + 203202.

It is an arithmetic number, because the mean of its divisors is an integer number (203202).

2⁴⁰⁶⁴⁰³ is an apocalyptic number.

406403 is a deficient number, since it is larger than the sum of its proper divisors (1).

406403 is an equidigital number, since it uses as much as digits as its factorization.

406403 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 17.

The square root of 406403 is about 637.4974509753. The cubic root of 406403 is about 74.0716982232.

The spelling of 406403 in words is "four hundred six thousand, four hundred three".