3861394085 has 4 divisors (see below), whose sum is σ = 4633672908. Its totient is φ = 3089115264.

The previous prime is 3861394021. The next prime is 3861394091. The reversal of 3861394085 is 5804931683.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2989136929 + 872257156 = 54673^2 + 29534^2 .

It is a cyclic number.

It is not a de Polignac number, because 3861394085 - 2⁶ = 3861394021 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, 386139404 + ... + 386139413.

It is an arithmetic number, because the mean of its divisors is an integer number (1158418227).

Almost surely, 2^3861394085 is an apocalyptic number.

It is an amenable number.

3861394085 is a deficient number, since it is larger than the sum of its proper divisors (772278823).

3861394085 is an equidigital number, since it uses as much as digits as its factorization.

3861394085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772278822.

The product of its (nonzero) digits is 622080, while the sum is 47.

The square root of 3861394085 is about 62140.1165512264. The cubic root of 3861394085 is about 1568.8498324112.

The spelling of 3861394085 in words is "three billion, eight hundred sixty-one million, three hundred ninety-four thousand, eighty-five".