906403 has 2 divisors, whose sum is σ = 906404. Its totient is φ = 906402.

The previous prime is 906391. The next prime is 906421. The reversal of 906403 is 304609.

It is a weak prime.

It is an emirp because it is prime and its reverse (304609) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 906403 - 2⁵ = 906371 is a prime.

It is not a weakly prime, because it can be changed into another prime (906473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 453201 + 453202.

It is an arithmetic number, because the mean of its divisors is an integer number (453202).

2⁹⁰⁶⁴⁰³ is an apocalyptic number.

906403 is a deficient number, since it is larger than the sum of its proper divisors (1).

906403 is an equidigital number, since it uses as much as digits as its factorization.

906403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 906403 is about 952.0519943785. The cubic root of 906403 is about 96.7773616322. Note that the first 3 decimals are identical.

The spelling of 906403 in words is "nine hundred six thousand, four hundred three".