916881 has 8 divisors (see below), whose sum is σ = 1397184. Its totient is φ = 523920.

The previous prime is 916879. The next prime is 916907. The reversal of 916881 is 188619.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 916881 - 2¹ = 916879 is a prime.

It is a super-2 number, since 2×916881² = 1681341536322, which contains 22 as substring.

It is a Curzon number.

916881 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 916881.

It is not an unprimeable number, because it can be changed into a prime (916831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21810 + ... + 21851.

It is an arithmetic number, because the mean of its divisors is an integer number (174648).

2⁹¹⁶⁸⁸¹ is an apocalyptic number.

It is an amenable number.

916881 is a deficient number, since it is larger than the sum of its proper divisors (480303).

916881 is a wasteful number, since it uses less digits than its factorization.

916881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43671.

The product of its digits is 3456, while the sum is 33.

The square root of 916881 is about 957.5390331470. The cubic root of 916881 is about 97.1488485965.

The spelling of 916881 in words is "nine hundred sixteen thousand, eight hundred eighty-one".