881891 has 4 divisors (see below), whose sum is σ = 894384. Its totient is φ = 869400.

The previous prime is 881849. The next prime is 881897. The reversal of 881891 is 198188.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-881891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (881897) 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, 6140 + ... + 6281.

It is an arithmetic number, because the mean of its divisors is an integer number (223596).

2⁸⁸¹⁸⁹¹ is an apocalyptic number.

881891 is a deficient number, since it is larger than the sum of its proper divisors (12493).

881891 is a wasteful number, since it uses less digits than its factorization.

881891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12492.

The product of its digits is 4608, while the sum is 35.

The square root of 881891 is about 939.0905174689. The cubic root of 881891 is about 95.8969887527.

The spelling of 881891 in words is "eight hundred eighty-one thousand, eight hundred ninety-one".