2081603 has 2 divisors, whose sum is σ = 2081604. Its totient is φ = 2081602.

The previous prime is 2081581. The next prime is 2081609. The reversal of 2081603 is 3061802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2081603 - 2²⁰ = 1033027 is a prime.

It is not a weakly prime, because it can be changed into another prime (2081609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1040801 + 1040802.

It is an arithmetic number, because the mean of its divisors is an integer number (1040802).

2^2081603 is an apocalyptic number.

2081603 is a deficient number, since it is larger than the sum of its proper divisors (1).

2081603 is an equidigital number, since it uses as much as digits as its factorization.

2081603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 2081603 is about 1442.7761434124. The cubic root of 2081603 is about 127.6828697183.

The spelling of 2081603 in words is "two million, eighty-one thousand, six hundred three".