821234099 has 16 divisors (see below), whose sum is σ = 960180480. Its totient is φ = 687804000.

The previous prime is 821234083. The next prime is 821234111. The reversal of 821234099 is 990432128.

821234099 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 821234099 - 2⁴ = 821234083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (821234599) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88712 + ... + 97530.

It is an arithmetic number, because the mean of its divisors is an integer number (60011280).

Almost surely, 2^821234099 is an apocalyptic number.

821234099 is a deficient number, since it is larger than the sum of its proper divisors (138946381).

821234099 is a wasteful number, since it uses less digits than its factorization.

821234099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9130.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 821234099 is about 28657.1823283448. The cubic root of 821234099 is about 936.4594816354.

The spelling of 821234099 in words is "eight hundred twenty-one million, two hundred thirty-four thousand, ninety-nine".