6891157 has 16 divisors (see below), whose sum is σ = 8692992. Its totient is φ = 5316480.

The previous prime is 6891149. The next prime is 6891161. The reversal of 6891157 is 7511986.

It is not a de Polignac number, because 6891157 - 2³ = 6891149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6891107) 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 15 ways as a sum of consecutive naturals, for example, 2808 + ... + 4654.

It is an arithmetic number, because the mean of its divisors is an integer number (543312).

Almost surely, 2^6891157 is an apocalyptic number.

It is an amenable number.

6891157 is a deficient number, since it is larger than the sum of its proper divisors (1801835).

6891157 is a wasteful number, since it uses less digits than its factorization.

6891157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1908.

The product of its digits is 15120, while the sum is 37.

The square root of 6891157 is about 2625.1013313775. The cubic root of 6891157 is about 190.2964623885.

The spelling of 6891157 in words is "six million, eight hundred ninety-one thousand, one hundred fifty-seven".