820814099 has 4 divisors (see below), whose sum is σ = 938073264. Its totient is φ = 703554936.

The previous prime is 820814083. The next prime is 820814101. The reversal of 820814099 is 990418028.

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

It is not a de Polignac number, because 820814099 - 2⁴ = 820814083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (820814039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58629572 + ... + 58629585.

It is an arithmetic number, because the mean of its divisors is an integer number (234518316).

Almost surely, 2^820814099 is an apocalyptic number.

820814099 is a deficient number, since it is larger than the sum of its proper divisors (117259165).

820814099 is a wasteful number, since it uses less digits than its factorization.

820814099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117259164.

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 820814099 is about 28649.8533853142. The cubic root of 820814099 is about 936.2998113490.

The spelling of 820814099 in words is "eight hundred twenty million, eight hundred fourteen thousand, ninety-nine".