3117843805 has 4 divisors (see below), whose sum is σ = 3741412572. Its totient is φ = 2494275040.

The previous prime is 3117843793. The next prime is 3117843847. The reversal of 3117843805 is 5083487113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5083487113 = 6829 ⋅744397.

It can be written as a sum of positive squares in 2 ways, for example, as 411035076 + 2706808729 = 20274^2 + 52027^2 .

It is not a de Polignac number, because 3117843805 - 2⁹ = 3117843293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 311784376 + ... + 311784385.

It is an arithmetic number, because the mean of its divisors is an integer number (935353143).

Almost surely, 2^3117843805 is an apocalyptic number.

It is an amenable number.

3117843805 is a deficient number, since it is larger than the sum of its proper divisors (623568767).

3117843805 is an equidigital number, since it uses as much as digits as its factorization.

3117843805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623568766.

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 3117843805 is about 55837.6557978574. The cubic root of 3117843805 is about 1460.8920246277.

The spelling of 3117843805 in words is "three billion, one hundred seventeen million, eight hundred forty-three thousand, eight hundred five".