3891871713 has 4 divisors (see below), whose sum is σ = 5189162288. Its totient is φ = 2594581140.

The previous prime is 3891871691. The next prime is 3891871747. The reversal of 3891871713 is 3171781983.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 3891871713 - 2²¹ = 3889774561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3891871793) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 648645283 + ... + 648645288.

It is an arithmetic number, because the mean of its divisors is an integer number (1297290572).

Almost surely, 2^3891871713 is an apocalyptic number.

It is an amenable number.

3891871713 is a deficient number, since it is larger than the sum of its proper divisors (1297290575).

3891871713 is a wasteful number, since it uses less digits than its factorization.

3891871713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297290574.

The product of its digits is 254016, while the sum is 48.

The square root of 3891871713 is about 62384.8676603549. The cubic root of 3891871713 is about 1572.9666159648.

The spelling of 3891871713 in words is "three billion, eight hundred ninety-one million, eight hundred seventy-one thousand, seven hundred thirteen".