989811 has 12 divisors (see below), whose sum is σ = 1450800. Its totient is φ = 650160.

The previous prime is 989803. The next prime is 989827. The reversal of 989811 is 118989.

989811 is nontrivially palindromic in base 8.

It is not a de Polignac number, because 989811 - 2³ = 989803 is a prime.

It is not an unprimeable number, because it can be changed into a prime (989831) 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, 136 + ... + 1413.

It is an arithmetic number, because the mean of its divisors is an integer number (120900).

2⁹⁸⁹⁸¹¹ is an apocalyptic number.

989811 is a deficient number, since it is larger than the sum of its proper divisors (460989).

989811 is a wasteful number, since it uses less digits than its factorization.

989811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1626 (or 1623 counting only the distinct ones).

The product of its digits is 5184, while the sum is 36.

The square root of 989811 is about 994.8924564997. The cubic root of 989811 is about 99.6592065845.

The spelling of 989811 in words is "nine hundred eighty-nine thousand, eight hundred eleven".