829621 has 6 divisors (see below), whose sum is σ = 898530. Its totient is φ = 765648.

The previous prime is 829613. The next prime is 829627. The reversal of 829621 is 126928.

It is a happy number.

829621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 98596 + 731025 = 314^2 + 855^2 .

It is not a de Polignac number, because 829621 - 2³ = 829613 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 829621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (829627) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2286 + ... + 2623.

It is an arithmetic number, because the mean of its divisors is an integer number (149755).

2⁸²⁹⁶²¹ is an apocalyptic number.

It is an amenable number.

829621 is a deficient number, since it is larger than the sum of its proper divisors (68909).

829621 is a wasteful number, since it uses less digits than its factorization.

829621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4935 (or 4922 counting only the distinct ones).

The product of its digits is 1728, while the sum is 28.

The square root of 829621 is about 910.8353308914. The cubic root of 829621 is about 93.9636572953.

The spelling of 829621 in words is "eight hundred twenty-nine thousand, six hundred twenty-one".