4491893863 has 2 divisors, whose sum is σ = 4491893864. Its totient is φ = 4491893862.

The previous prime is 4491893851. The next prime is 4491893891. The reversal of 4491893863 is 3683981944.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4491893863 is a prime.

It is a super-2 number, since 2×4491893863² = 40354220952914125538, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4491893803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2245946931 + 2245946932.

It is an arithmetic number, because the mean of its divisors is an integer number (2245946932).

Almost surely, 2^4491893863 is an apocalyptic number.

4491893863 is a deficient number, since it is larger than the sum of its proper divisors (1).

4491893863 is an equidigital number, since it uses as much as digits as its factorization.

4491893863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4478976, while the sum is 55.

The square root of 4491893863 is about 67021.5925131595. The cubic root of 4491893863 is about 1649.9716999125.

The spelling of 4491893863 in words is "four billion, four hundred ninety-one million, eight hundred ninety-three thousand, eight hundred sixty-three".