3859021871 has 4 divisors (see below), whose sum is σ = 3861250392. Its totient is φ = 3856793352.

The previous prime is 3859021867. The next prime is 3859021877. The reversal of 3859021871 is 1781209583.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1781209583 = 673 ⋅2646671.

It is a cyclic number.

It is not a de Polignac number, because 3859021871 - 2² = 3859021867 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3859021877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1111661 + ... + 1115126.

It is an arithmetic number, because the mean of its divisors is an integer number (965312598).

Almost surely, 2^3859021871 is an apocalyptic number.

3859021871 is a deficient number, since it is larger than the sum of its proper divisors (2228521).

3859021871 is a wasteful number, since it uses less digits than its factorization.

3859021871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2228520.

The product of its (nonzero) digits is 120960, while the sum is 44.

The square root of 3859021871 is about 62121.0259976443. The cubic root of 3859021871 is about 1568.5284968317.

The spelling of 3859021871 in words is "three billion, eight hundred fifty-nine million, twenty-one thousand, eight hundred seventy-one".