6989116571 has 4 divisors (see below), whose sum is σ = 6989441712. Its totient is φ = 6988791432.

The previous prime is 6989116507. The next prime is 6989116597. The reversal of 6989116571 is 1756119896.

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

It is a cyclic number.

It is not a de Polignac number, because 6989116571 - 2⁶ = 6989116507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6989116471) 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, 127856 + ... + 174141.

It is an arithmetic number, because the mean of its divisors is an integer number (1747360428).

Almost surely, 2^6989116571 is an apocalyptic number.

6989116571 is a deficient number, since it is larger than the sum of its proper divisors (325141).

6989116571 is a wasteful number, since it uses less digits than its factorization.

6989116571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325140.

The product of its digits is 816480, while the sum is 53.

The square root of 6989116571 is about 83600.9364241813. The cubic root of 6989116571 is about 1911.9392756394.

The spelling of 6989116571 in words is "six billion, nine hundred eighty-nine million, one hundred sixteen thousand, five hundred seventy-one".