881091 has 8 divisors (see below), whose sum is σ = 1305360. Its totient is φ = 587376.

The previous prime is 881077. The next prime is 881099. The reversal of 881091 is 190188.

It is not a de Polignac number, because 881091 - 2¹⁰ = 880067 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 32633 = 881091 / (8 + 8 + 1 + 0 + 9 + 1).

881091 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (881099) 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 7 ways as a sum of consecutive naturals, for example, 16290 + ... + 16343.

It is an arithmetic number, because the mean of its divisors is an integer number (163170).

2⁸⁸¹⁰⁹¹ is an apocalyptic number.

881091 is a deficient number, since it is larger than the sum of its proper divisors (424269).

881091 is a wasteful number, since it uses less digits than its factorization.

881091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32642 (or 32636 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 27.

The square root of 881091 is about 938.6644767967. The cubic root of 881091 is about 95.8679825979.

The spelling of 881091 in words is "eight hundred eighty-one thousand, ninety-one".