829838861 has 4 divisors (see below), whose sum is σ = 845496252. Its totient is φ = 814181472.

The previous prime is 829838839. The next prime is 829838887. The reversal of 829838861 is 168838928.

829838861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 433430761 + 396408100 = 20819^2 + 19910^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-829838861 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53), and also a Moran number because the ratio is a prime number: 15657337 = 829838861 / (8 + 2 + 9 + 8 + 3 + 8 + 8 + 6 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (829838461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7828616 + ... + 7828721.

It is an arithmetic number, because the mean of its divisors is an integer number (211374063).

Almost surely, 2^829838861 is an apocalyptic number.

It is an amenable number.

829838861 is a deficient number, since it is larger than the sum of its proper divisors (15657391).

829838861 is a wasteful number, since it uses less digits than its factorization.

829838861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15657390.

The product of its digits is 1327104, while the sum is 53.

The square root of 829838861 is about 28806.9238378554. The cubic root of 829838861 is about 939.7188162294.

The spelling of 829838861 in words is "eight hundred twenty-nine million, eight hundred thirty-eight thousand, eight hundred sixty-one".