711891 has 12 divisors (see below), whose sum is σ = 1041768. Its totient is φ = 468384.

The previous prime is 711889. The next prime is 711899. The reversal of 711891 is 198117.

It is not a de Polignac number, because 711891 - 2¹ = 711889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (711899) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 271 + ... + 1223.

It is an arithmetic number, because the mean of its divisors is an integer number (86814).

2⁷¹¹⁸⁹¹ is an apocalyptic number.

711891 is a deficient number, since it is larger than the sum of its proper divisors (329877).

711891 is a wasteful number, since it uses less digits than its factorization.

711891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1042 (or 1039 counting only the distinct ones).

The product of its digits is 504, while the sum is 27.

The square root of 711891 is about 843.7363332226. The cubic root of 711891 is about 89.2903449636.

The spelling of 711891 in words is "seven hundred eleven thousand, eight hundred ninety-one".