985829 has 4 divisors (see below), whose sum is σ = 1061676. Its totient is φ = 909984.

The previous prime is 985819. The next prime is 985867. The reversal of 985829 is 928589.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 928589 = 37 ⋅25097.

It can be written as a sum of positive squares in 2 ways, for example, as 532900 + 452929 = 730^2 + 673^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-985829 is a prime.

It is a super-3 number, since 3×985829³ = 2874259817825633367, which contains 333 as substring.

It is a Duffinian number.

It is a Curzon 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 985829.

It is not an unprimeable number, because it can be changed into a prime (985819) 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 3 ways as a sum of consecutive naturals, for example, 37904 + ... + 37929.

It is an arithmetic number, because the mean of its divisors is an integer number (265419).

2⁹⁸⁵⁸²⁹ is an apocalyptic number.

It is an amenable number.

985829 is a deficient number, since it is larger than the sum of its proper divisors (75847).

985829 is a wasteful number, since it uses less digits than its factorization.

985829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75846.

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

The square root of 985829 is about 992.8892183925. The cubic root of 985829 is about 99.5253842964.

The spelling of 985829 in words is "nine hundred eighty-five thousand, eight hundred twenty-nine".