1663003939 has 2 divisors, whose sum is σ = 1663003940. Its totient is φ = 1663003938.

The previous prime is 1663003889. The next prime is 1663003963. The reversal of 1663003939 is 9393003661.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (9393003661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1663003939 - 2¹¹ = 1663001891 is a prime.

It is a super-2 number, since 2×1663003939² = 5531164202259031442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1663003439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831501969 + 831501970.

It is an arithmetic number, because the mean of its divisors is an integer number (831501970).

Almost surely, 2^1663003939 is an apocalyptic number.

1663003939 is a deficient number, since it is larger than the sum of its proper divisors (1).

1663003939 is an equidigital number, since it uses as much as digits as its factorization.

1663003939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 78732, while the sum is 40.

The square root of 1663003939 is about 40779.9453040339. The cubic root of 1663003939 is about 1184.7619357143.

The spelling of 1663003939 in words is "one billion, six hundred sixty-three million, three thousand, nine hundred thirty-nine".