820116443 has 4 divisors (see below), whose sum is σ = 829997448. Its totient is φ = 810235440.

The previous prime is 820116421. The next prime is 820116449. The reversal of 820116443 is 344611028.

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

It is a cyclic number.

It is not a de Polignac number, because 820116443 - 2²⁶ = 753007579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (820116449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4940378 + ... + 4940543.

It is an arithmetic number, because the mean of its divisors is an integer number (207499362).

Almost surely, 2^820116443 is an apocalyptic number.

820116443 is a gapful number since it is divisible by the number (83) formed by its first and last digit.

820116443 is a deficient number, since it is larger than the sum of its proper divisors (9881005).

820116443 is an equidigital number, since it uses as much as digits as its factorization.

820116443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9881004.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 820116443 is about 28637.6752373512. The cubic root of 820116443 is about 936.0344648929.

The spelling of 820116443 in words is "eight hundred twenty million, one hundred sixteen thousand, four hundred forty-three".