3943663493 has 8 divisors (see below), whose sum is σ = 4916775360. Its totient is φ = 3072984480.

The previous prime is 3943663457. The next prime is 3943663517.

It is a happy number.

3943663493 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3943663493 is a prime.

It is a super-2 number, since 2×3943663493² = 31104963492041922098, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3943663393) 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 in 7 ways as a sum of consecutive naturals, for example, 25608128 + ... + 25608281.

It is an arithmetic number, because the mean of its divisors is an integer number (614596920).

Almost surely, 2^3943663493 is an apocalyptic number.

It is an amenable number.

3943663493 is a deficient number, since it is larger than the sum of its proper divisors (973111867).

3943663493 is a wasteful number, since it uses less digits than its factorization.

3943663493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51216427.

The product of its digits is 3779136, while the sum is 50.

The square root of 3943663493 is about 62798.5946737664. The cubic root of 3943663493 is about 1579.9134029610.

The spelling of 3943663493 in words is "three billion, nine hundred forty-three million, six hundred sixty-three thousand, four hundred ninety-three".