827638999 has 8 divisors (see below), whose sum is σ = 955989648. Its totient is φ = 708140160.

The previous prime is 827638979. The next prime is 827639041. The reversal of 827638999 is 999836728.

It is a happy number.

827638999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 827638999 - 2¹¹ = 827636951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (827638909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2212752 + ... + 2213125.

It is an arithmetic number, because the mean of its divisors is an integer number (119498706).

Almost surely, 2^827638999 is an apocalyptic number.

827638999 is a deficient number, since it is larger than the sum of its proper divisors (128350649).

827638999 is a wasteful number, since it uses less digits than its factorization.

827638999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4425905.

The product of its digits is 11757312, while the sum is 61.

The square root of 827638999 is about 28768.7156300034. The cubic root of 827638999 is about 938.8876985934.

The spelling of 827638999 in words is "eight hundred twenty-seven million, six hundred thirty-eight thousand, nine hundred ninety-nine".