1997003 has 2 divisors, whose sum is σ = 1997004. Its totient is φ = 1997002.

The previous prime is 1996979. The next prime is 1997029. The reversal of 1997003 is 3007991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1997003 - 2¹⁰ = 1995979 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1997053) 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, 998501 + 998502.

It is an arithmetic number, because the mean of its divisors is an integer number (998502).

2^1997003 is an apocalyptic number.

1997003 is a deficient number, since it is larger than the sum of its proper divisors (1).

1997003 is an equidigital number, since it uses as much as digits as its factorization.

1997003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1701, while the sum is 29.

The square root of 1997003 is about 1413.1535656113. The cubic root of 1997003 is about 125.9291404718.

The spelling of 1997003 in words is "one million, nine hundred ninety-seven thousand, three".