989311 has 4 divisors (see below), whose sum is σ = 1041400. Its totient is φ = 937224.

The previous prime is 989309. The next prime is 989321. The reversal of 989311 is 113989.

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

It is a cyclic number.

It is not a de Polignac number, because 989311 - 2¹ = 989309 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989321) 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 3 ways as a sum of consecutive naturals, for example, 26016 + ... + 26053.

It is an arithmetic number, because the mean of its divisors is an integer number (260350).

2⁹⁸⁹³¹¹ is an apocalyptic number.

989311 is a deficient number, since it is larger than the sum of its proper divisors (52089).

989311 is a wasteful number, since it uses less digits than its factorization.

989311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52088.

The product of its digits is 1944, while the sum is 31.

The square root of 989311 is about 994.6411413168. The cubic root of 989311 is about 99.6424229103.

It can be divided in two parts, 98 and 9311, that added together give a square (9409 = 97²).

The spelling of 989311 in words is "nine hundred eighty-nine thousand, three hundred eleven".