828931 has 4 divisors (see below), whose sum is σ = 831600. Its totient is φ = 826264.

The previous prime is 828923. The next prime is 828941. The reversal of 828931 is 139828.

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

It is a cyclic number.

It is not a de Polignac number, because 828931 - 2³ = 828923 is a prime.

It is a super-2 number, since 2×828931² = 1374253205522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 828893 and 828902.

It is not an unprimeable number, because it can be changed into a prime (828901) 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, 796 + ... + 1513.

It is an arithmetic number, because the mean of its divisors is an integer number (207900).

2⁸²⁸⁹³¹ is an apocalyptic number.

828931 is a deficient number, since it is larger than the sum of its proper divisors (2669).

828931 is a wasteful number, since it uses less digits than its factorization.

828931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2668.

The product of its digits is 3456, while the sum is 31.

The square root of 828931 is about 910.4564789159. The cubic root of 828931 is about 93.9376000530.

The spelling of 828931 in words is "eight hundred twenty-eight thousand, nine hundred thirty-one".