1003320397 has 2 divisors, whose sum is σ = 1003320398. Its totient is φ = 1003320396.

The previous prime is 1003320349. The next prime is 1003320401. The reversal of 1003320397 is 7930233001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 557857161 + 445463236 = 23619^2 + 21106^2 .

It is an emirp because it is prime and its reverse (7930233001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1003320397 - 2²⁷ = 869102669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1003320317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501660198 + 501660199.

It is an arithmetic number, because the mean of its divisors is an integer number (501660199).

Almost surely, 2^1003320397 is an apocalyptic number.

It is an amenable number.

1003320397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1003320397 is an equidigital number, since it uses as much as digits as its factorization.

1003320397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3402, while the sum is 28.

The square root of 1003320397 is about 31675.2331798836. The cubic root of 1003320397 is about 1001.1055762507.

Adding to 1003320397 its reverse (7930233001), we get a palindrome (8933553398).

The spelling of 1003320397 in words is "one billion, three million, three hundred twenty thousand, three hundred ninety-seven".