4091603 has 2 divisors, whose sum is σ = 4091604. Its totient is φ = 4091602.

The previous prime is 4091599. The next prime is 4091609. The reversal of 4091603 is 3061904.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4091603 - 2² = 4091599 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (4091609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2045801 + 2045802.

It is an arithmetic number, because the mean of its divisors is an integer number (2045802).

Almost surely, 2^4091603 is an apocalyptic number.

4091603 is a deficient number, since it is larger than the sum of its proper divisors (1).

4091603 is an equidigital number, since it uses as much as digits as its factorization.

4091603 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 23.

The square root of 4091603 is about 2022.7711190345. The cubic root of 4091603 is about 159.9427268970.

The spelling of 4091603 in words is "four million, ninety-one thousand, six hundred three".