1003000073 has 2 divisors, whose sum is σ = 1003000074. Its totient is φ = 1003000072.

The previous prime is 1003000043. The next prime is 1003000081. The reversal of 1003000073 is 3700003001.

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., 898081024 + 104919049 = 29968^2 + 10243^2 .

It is an emirp because it is prime and its reverse (3700003001) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1003000073 is a prime.

It is not a weakly prime, because it can be changed into another prime (1003000043) 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, 501500036 + 501500037.

It is an arithmetic number, because the mean of its divisors is an integer number (501500037).

Almost surely, 2^1003000073 is an apocalyptic number.

It is an amenable number.

1003000073 is a deficient number, since it is larger than the sum of its proper divisors (1).

1003000073 is an equidigital number, since it uses as much as digits as its factorization.

1003000073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63, while the sum is 14.

The square root of 1003000073 is about 31670.1763967301. The cubic root of 1003000073 is about 1000.9990259481. Note that the first 3 decimals are identical.

Adding to 1003000073 its reverse (3700003001), we get a palindrome (4703003074).

The spelling of 1003000073 in words is "one billion, three million, seventy-three", and thus it is an aban number and an uban number.