3871247085 has 12 divisors (see below), whose sum is σ = 6710161692. Its totient is φ = 2064665088.

The previous prime is 3871247077. The next prime is 3871247099. The reversal of 3871247085 is 5807421783.

3871247085 is a `hidden beast` number, since 38 + 71 + 2 + 470 + 85 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2181543849 + 1689703236 = 46707^2 + 41106^2 .

It is not a de Polignac number, because 3871247085 - 2³ = 3871247077 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 86027713 = 3871247085 / (3 + 8 + 7 + 1 + 2 + 4 + 7 + 0 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 3871247085.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43013812 + ... + 43013901.

It is an arithmetic number, because the mean of its divisors is an integer number (559180141).

Almost surely, 2^3871247085 is an apocalyptic number.

It is an amenable number.

3871247085 is a deficient number, since it is larger than the sum of its proper divisors (2838914607).

3871247085 is a wasteful number, since it uses less digits than its factorization.

3871247085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86027724 (or 86027721 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The square root of 3871247085 is about 62219.3465491241. The cubic root of 3871247085 is about 1570.1830942564.

The spelling of 3871247085 in words is "three billion, eight hundred seventy-one million, two hundred forty-seven thousand, eighty-five".