989305 has 8 divisors (see below), whose sum is σ = 1193544. Its totient is φ = 787200.

The previous prime is 989293. The next prime is 989309. The reversal of 989305 is 503989.

It can be written as a sum of positive squares in 4 ways, for example, as 107584 + 881721 = 328^2 + 939^2 .

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

It is not a de Polignac number, because 989305 - 2¹⁷ = 858233 is a prime.

It is a Duffinian number.

989305 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (989309) 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, 795 + ... + 1615.

It is an arithmetic number, because the mean of its divisors is an integer number (149193).

2⁹⁸⁹³⁰⁵ is an apocalyptic number.

It is an amenable number.

989305 is a deficient number, since it is larger than the sum of its proper divisors (204239).

989305 is a wasteful number, since it uses less digits than its factorization.

989305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1067.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 989305 is about 994.6381251490. The cubic root of 989305 is about 99.6422214718.

The spelling of 989305 in words is "nine hundred eighty-nine thousand, three hundred five".