4006403 has 2 divisors, whose sum is σ = 4006404. Its totient is φ = 4006402.

The previous prime is 4006381. The next prime is 4006411. The reversal of 4006403 is 3046004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4006403 - 2¹² = 4002307 is a prime.

It is not a weakly prime, because it can be changed into another prime (4006423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2003201 + 2003202.

It is an arithmetic number, because the mean of its divisors is an integer number (2003202).

Almost surely, 2^4006403 is an apocalyptic number.

4006403 is a deficient number, since it is larger than the sum of its proper divisors (1).

4006403 is an equidigital number, since it uses as much as digits as its factorization.

4006403 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 4006403 is about 2001.6001099121. The cubic root of 4006403 is about 158.8247611164.

The spelling of 4006403 in words is "four million, six thousand, four hundred three".