9971603 has 2 divisors, whose sum is σ = 9971604. Its totient is φ = 9971602.

The previous prime is 9971597. The next prime is 9971641. The reversal of 9971603 is 3061799.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9971603 - 2⁶ = 9971539 is a prime.

It is equal to p₆₆₂₈₅₈ and since 9971603 and 662858 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (9971653) 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, 4985801 + 4985802.

It is an arithmetic number, because the mean of its divisors is an integer number (4985802).

Almost surely, 2^9971603 is an apocalyptic number.

9971603 is a deficient number, since it is larger than the sum of its proper divisors (1).

9971603 is an equidigital number, since it uses as much as digits as its factorization.

9971603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10206, while the sum is 35.

The square root of 9971603 is about 3157.7845081639. The cubic root of 9971603 is about 215.2393440569.

The spelling of 9971603 in words is "nine million, nine hundred seventy-one thousand, six hundred three".