3993741805 has 4 divisors (see below), whose sum is σ = 4792490172. Its totient is φ = 3194993440.

The previous prime is 3993741769. The next prime is 3993741823. The reversal of 3993741805 is 5081473993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5081473993 = 701 ⋅7248893.

It can be written as a sum of positive squares in 2 ways, for example, as 2940025284 + 1053716521 = 54222^2 + 32461^2 .

It is not a de Polignac number, because 3993741805 - 2²¹ = 3991644653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 399374176 + ... + 399374185.

It is an arithmetic number, because the mean of its divisors is an integer number (1198122543).

Almost surely, 2^3993741805 is an apocalyptic number.

It is an amenable number.

3993741805 is a deficient number, since it is larger than the sum of its proper divisors (798748367).

3993741805 is an equidigital number, since it uses as much as digits as its factorization.

3993741805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798748366.

The product of its (nonzero) digits is 816480, while the sum is 49.

The square root of 3993741805 is about 63196.0584609515. The cubic root of 3993741805 is about 1586.5727644086.

The spelling of 3993741805 in words is "three billion, nine hundred ninety-three million, seven hundred forty-one thousand, eight hundred five".