828950009 has 4 divisors (see below), whose sum is σ = 829011300. Its totient is φ = 828888720.

The previous prime is 828949997. The next prime is 828950011. The reversal of 828950009 is 900059828.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 426546409 + 402403600 = 20653^2 + 20060^2 .

It is a cyclic number.

It is not a de Polignac number, because 828950009 - 2¹⁶ = 828884473 is a prime.

It is a super-2 number, since 2×828950009² = 1374316234842200162, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (828950099) 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, 422 + ... + 40719.

It is an arithmetic number, because the mean of its divisors is an integer number (207252825).

Almost surely, 2^828950009 is an apocalyptic number.

It is an amenable number.

828950009 is a deficient number, since it is larger than the sum of its proper divisors (61291).

828950009 is a wasteful number, since it uses less digits than its factorization.

828950009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61290.

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

The square root of 828950009 is about 28791.4919550898. The cubic root of 828950009 is about 939.3831810478.

The spelling of 828950009 in words is "eight hundred twenty-eight million, nine hundred fifty thousand, nine".