1863428563 has 2 divisors, whose sum is σ = 1863428564. Its totient is φ = 1863428562.

The previous prime is 1863428533. The next prime is 1863428617. The reversal of 1863428563 is 3658243681.

It is a weak prime.

It is an emirp because it is prime and its reverse (3658243681) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1863428563 is a prime.

It is not a weakly prime, because it can be changed into another prime (1863428503) 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, 931714281 + 931714282.

It is an arithmetic number, because the mean of its divisors is an integer number (931714282).

Almost surely, 2^1863428563 is an apocalyptic number.

1863428563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1863428563 is an equidigital number, since it uses as much as digits as its factorization.

1863428563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 829440, while the sum is 46.

The square root of 1863428563 is about 43167.4479556065. The cubic root of 1863428563 is about 1230.5641237647.

The spelling of 1863428563 in words is "one billion, eight hundred sixty-three million, four hundred twenty-eight thousand, five hundred sixty-three".