1003311997 has 2 divisors, whose sum is σ = 1003311998. Its totient is φ = 1003311996.

The previous prime is 1003311977. The next prime is 1003312021. The reversal of 1003311997 is 7991133001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 948270436 + 55041561 = 30794^2 + 7419^2 .

It is an emirp because it is prime and its reverse (7991133001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1003311997 - 2²³ = 994923389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1003311917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501655998 + 501655999.

It is an arithmetic number, because the mean of its divisors is an integer number (501655999).

Almost surely, 2^1003311997 is an apocalyptic number.

It is an amenable number.

1003311997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1003311997 is an equidigital number, since it uses as much as digits as its factorization.

1003311997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5103, while the sum is 34.

The square root of 1003311997 is about 31675.1005838971. The cubic root of 1003311997 is about 1001.1027824239.

Adding to 1003311997 its reverse (7991133001), we get a palindrome (8994444998).

The spelling of 1003311997 in words is "one billion, three million, three hundred eleven thousand, nine hundred ninety-seven".