820268473 has 4 divisors (see below), whose sum is σ = 839344528. Its totient is φ = 801192420.

The previous prime is 820268453. The next prime is 820268483. The reversal of 820268473 is 374862028.

820268473 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 820268473 - 2⁵ = 820268441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (820268453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9537963 + ... + 9538048.

It is an arithmetic number, because the mean of its divisors is an integer number (209836132).

Almost surely, 2^820268473 is an apocalyptic number.

It is an amenable number.

820268473 is a deficient number, since it is larger than the sum of its proper divisors (19076055).

820268473 is a wasteful number, since it uses less digits than its factorization.

820268473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19076054.

The product of its (nonzero) digits is 129024, while the sum is 40.

The square root of 820268473 is about 28640.3294848366. The cubic root of 820268473 is about 936.0923007968.

The spelling of 820268473 in words is "eight hundred twenty million, two hundred sixty-eight thousand, four hundred seventy-three".