821199606 has 12 divisors (see below), whose sum is σ = 1642539612. Its totient is φ = 273709804.

The previous prime is 821199563. The next prime is 821199611. The reversal of 821199606 is 606991128.

821199606 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 64345 + ... + 76043.

It is an arithmetic number, because the mean of its divisors is an integer number (136878301).

Almost surely, 2^821199606 is an apocalyptic number.

821199606 is an abundant number, since it is smaller than the sum of its proper divisors (821340006).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

821199606 is an frugal number, since it uses more digits than its factorization.

821199606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23403 (or 11704 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 821199606 is about 28656.5805008204. The cubic root of 821199606 is about 936.4463705752.

The spelling of 821199606 in words is "eight hundred twenty-one million, one hundred ninety-nine thousand, six hundred six".