1603963 has 2 divisors, whose sum is σ = 1603964. Its totient is φ = 1603962.

The previous prime is 1603957. The next prime is 1604003. The reversal of 1603963 is 3693061.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1603963 - 2¹³ = 1595771 is a prime.

It is not a weakly prime, because it can be changed into another prime (1603363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 801981 + 801982.

It is an arithmetic number, because the mean of its divisors is an integer number (801982).

2^1603963 is an apocalyptic number.

1603963 is a deficient number, since it is larger than the sum of its proper divisors (1).

1603963 is an equidigital number, since it uses as much as digits as its factorization.

1603963 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 1603963 is about 1266.4766085483. The cubic root of 1603963 is about 117.0571955968.

The spelling of 1603963 in words is "one million, six hundred three thousand, nine hundred sixty-three".