1000393 has 2 divisors, whose sum is σ = 1000394. Its totient is φ = 1000392.

The previous prime is 1000381. The next prime is 1000397. The reversal of 1000393 is 3930001.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 868624 + 131769 = 932^2 + 363^2 .

It is an emirp because it is prime and its reverse (3930001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1000393 - 2¹⁷ = 869321 is a prime.

It is not a weakly prime, because it can be changed into another prime (1000397) 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, 500196 + 500197.

It is an arithmetic number, because the mean of its divisors is an integer number (500197).

2^1000393 is an apocalyptic number.

It is an amenable number.

1000393 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000393 is an equidigital number, since it uses as much as digits as its factorization.

1000393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81, while the sum is 16.

The square root of 1000393 is about 1000.1964806977. The cubic root of 1000393 is about 100.0130982843.

Adding to 1000393 its reverse (3930001), we get a palindrome (4930394).

The spelling of 1000393 in words is "one million, three hundred ninety-three", and thus it is an aban number.