989723 has 8 divisors (see below), whose sum is σ = 1197792. Its totient is φ = 798336.

The previous prime is 989719. The next prime is 989743. The reversal of 989723 is 327989.

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

It is not a de Polignac number, because 989723 - 2² = 989719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (989743) 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, 4040 + ... + 4277.

It is an arithmetic number, because the mean of its divisors is an integer number (149724).

2⁹⁸⁹⁷²³ is an apocalyptic number.

989723 is a deficient number, since it is larger than the sum of its proper divisors (208069).

989723 is a wasteful number, since it uses less digits than its factorization.

989723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8341.

The product of its digits is 27216, while the sum is 38.

The square root of 989723 is about 994.8482296310. The cubic root of 989723 is about 99.6562530677.

The spelling of 989723 in words is "nine hundred eighty-nine thousand, seven hundred twenty-three".