1630728863 has 2 divisors, whose sum is σ = 1630728864. Its totient is φ = 1630728862.

The previous prime is 1630728839. The next prime is 1630728871. The reversal of 1630728863 is 3688270361.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1630728863 - 2¹⁶ = 1630663327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1630728833) 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, 815364431 + 815364432.

It is an arithmetic number, because the mean of its divisors is an integer number (815364432).

Almost surely, 2^1630728863 is an apocalyptic number.

1630728863 is a deficient number, since it is larger than the sum of its proper divisors (1).

1630728863 is an equidigital number, since it uses as much as digits as its factorization.

1630728863 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 44.

The square root of 1630728863 is about 40382.2840240618. The cubic root of 1630728863 is about 1177.0473105658.

The spelling of 1630728863 in words is "one billion, six hundred thirty million, seven hundred twenty-eight thousand, eight hundred sixty-three".