989825 has 18 divisors (see below), whose sum is σ = 1313346. Its totient is φ = 739840.

The previous prime is 989803. The next prime is 989827. The reversal of 989825 is 528989.

989825 = 703² + 704².

It is a happy number.

It can be written as a sum of positive squares in 9 ways, for example, as 37249 + 952576 = 193^2 + 976^2 .

It is not a de Polignac number, because 989825 - 2⁶ = 989761 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 989825.

It is not an unprimeable number, because it can be changed into a prime (989827) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 7157 + ... + 7293.

2⁹⁸⁹⁸²⁵ is an apocalyptic number.

989825 is the 704-th centered square number.

It is an amenable number.

989825 is a deficient number, since it is larger than the sum of its proper divisors (323521).

989825 is a wasteful number, since it uses less digits than its factorization.

989825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181 (or 159 counting only the distinct ones).

The product of its digits is 51840, while the sum is 41.

The square root of 989825 is about 994.8994924112. The cubic root of 989825 is about 99.6596764460.

The spelling of 989825 in words is "nine hundred eighty-nine thousand, eight hundred twenty-five".