1663839013 has 2 divisors, whose sum is σ = 1663839014. Its totient is φ = 1663839012.

The previous prime is 1663838983. The next prime is 1663839019. The reversal of 1663839013 is 3109383661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1663171524 + 667489 = 40782^2 + 817^2 .

It is a cyclic number.

It is not a de Polignac number, because 1663839013 - 2¹³ = 1663830821 is a prime.

It is a super-2 number, since 2×1663839013² = 5536720522361628338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1663839019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831919506 + 831919507.

It is an arithmetic number, because the mean of its divisors is an integer number (831919507).

Almost surely, 2^1663839013 is an apocalyptic number.

It is an amenable number.

1663839013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1663839013 is an equidigital number, since it uses as much as digits as its factorization.

1663839013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 1663839013 is about 40790.1828017478. The cubic root of 1663839013 is about 1184.9602111181.

The spelling of 1663839013 in words is "one billion, six hundred sixty-three million, eight hundred thirty-nine thousand, thirteen".