3993659181 has 16 divisors (see below), whose sum is σ = 5918224000. Its totient is φ = 2661678144.

The previous prime is 3993659177. The next prime is 3993659183. The reversal of 3993659181 is 1819563993.

It is not a de Polignac number, because 3993659181 - 2² = 3993659177 is a prime.

It is a super-2 number, since 2×3993659181² = 31898627307971181522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3993659183) 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 15 ways as a sum of consecutive naturals, for example, 84645 + ... + 123093.

It is an arithmetic number, because the mean of its divisors is an integer number (369889000).

Almost surely, 2^3993659181 is an apocalyptic number.

It is an amenable number.

3993659181 is a deficient number, since it is larger than the sum of its proper divisors (1924564819).

3993659181 is a wasteful number, since it uses less digits than its factorization.

3993659181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42305 (or 42299 counting only the distinct ones).

The product of its digits is 1574640, while the sum is 54.

The square root of 3993659181 is about 63195.4047459149. The cubic root of 3993659181 is about 1586.5618231328.

The spelling of 3993659181 in words is "three billion, nine hundred ninety-three million, six hundred fifty-nine thousand, one hundred eighty-one".