6891312 has 20 divisors (see below), whose sum is σ = 17802680. Its totient is φ = 2297088.

The previous prime is 6891289. The next prime is 6891317. The reversal of 6891312 is 2131986.

It is a self number, because there is not a number n which added to its sum of digits gives 6891312.

It is not an unprimeable number, because it can be changed into a prime (6891317) 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, 71737 + ... + 71832.

It is an arithmetic number, because the mean of its divisors is an integer number (890134).

Almost surely, 2^6891312 is an apocalyptic number.

It is an amenable number.

6891312 is an abundant number, since it is smaller than the sum of its proper divisors (10911368).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6891312 is a wasteful number, since it uses less digits than its factorization.

6891312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143580 (or 143574 counting only the distinct ones).

The product of its digits is 2592, while the sum is 30.

The square root of 6891312 is about 2625.1308538814. The cubic root of 6891312 is about 190.2978891315.

The spelling of 6891312 in words is "six million, eight hundred ninety-one thousand, three hundred twelve".