6891151 has 8 divisors (see below), whose sum is σ = 7048064. Its totient is φ = 6735960.

The previous prime is 6891149. The next prime is 6891161. The reversal of 6891151 is 1511986.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6891151 - 2¹ = 6891149 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 (6891161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10606 + ... + 11236.

It is an arithmetic number, because the mean of its divisors is an integer number (881008).

Almost surely, 2^6891151 is an apocalyptic number.

6891151 is a deficient number, since it is larger than the sum of its proper divisors (156913).

6891151 is a wasteful number, since it uses less digits than its factorization.

6891151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861.

The product of its digits is 2160, while the sum is 31.

The square root of 6891151 is about 2625.1001885642. The cubic root of 6891151 is about 190.2964071593.

It can be divided in two parts, 68 and 91151, that added together give a palindrome (91219).

The spelling of 6891151 in words is "six million, eight hundred ninety-one thousand, one hundred fifty-one".