3999434185 has 8 divisors (see below), whose sum is σ = 4814656200. Its totient is φ = 3189323904.

The previous prime is 3999434119. The next prime is 3999434237. The reversal of 3999434185 is 5814349993.

It is a happy number.

3999434185 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 302307769 + 3697126416 = 17387^2 + 60804^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 3999434185 - 2¹³ = 3999425993 is a prime.

It is a super-2 number, since 2×3999434185² = 31990947600293228450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1276210 + ... + 1279339.

It is an arithmetic number, because the mean of its divisors is an integer number (601832025).

Almost surely, 2^3999434185 is an apocalyptic number.

It is an amenable number.

3999434185 is a deficient number, since it is larger than the sum of its proper divisors (815222015).

3999434185 is a wasteful number, since it uses less digits than its factorization.

3999434185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2555867.

The product of its digits is 4199040, while the sum is 55.

The square root of 3999434185 is about 63241.0798848344. The cubic root of 3999434185 is about 1587.3262004949.

The spelling of 3999434185 in words is "three billion, nine hundred ninety-nine million, four hundred thirty-four thousand, one hundred eighty-five".