3969807871 has 4 divisors (see below), whose sum is σ = 3972468312. Its totient is φ = 3967147432.

The previous prime is 3969807869. The next prime is 3969807893. The reversal of 3969807871 is 1787089693.

3969807871 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1787089693 = 3517 ⋅508129.

It is a cyclic number.

It is not a de Polignac number, because 3969807871 - 2¹ = 3969807869 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3969807371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1327981 + ... + 1330966.

It is an arithmetic number, because the mean of its divisors is an integer number (993117078).

Almost surely, 2^3969807871 is an apocalyptic number.

3969807871 is a deficient number, since it is larger than the sum of its proper divisors (2660441).

3969807871 is a wasteful number, since it uses less digits than its factorization.

3969807871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2660440.

The product of its (nonzero) digits is 4572288, while the sum is 58.

The square root of 3969807871 is about 63006.4113483699. The cubic root of 3969807871 is about 1583.3970427649.

The spelling of 3969807871 in words is "three billion, nine hundred sixty-nine million, eight hundred seven thousand, eight hundred seventy-one".