820422673 has 32 divisors (see below), whose sum is σ = 1018368000. Its totient is φ = 645454656.

The previous prime is 820422623. The next prime is 820422683. The reversal of 820422673 is 376224028.

It is not a de Polignac number, because 820422673 - 2¹³ = 820414481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (820422623) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 928690 + ... + 929572.

It is an arithmetic number, because the mean of its divisors is an integer number (31824000).

Almost surely, 2^820422673 is an apocalyptic number.

It is an amenable number.

820422673 is a deficient number, since it is larger than the sum of its proper divisors (197945327).

820422673 is a wasteful number, since it uses less digits than its factorization.

820422673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141.

The product of its (nonzero) digits is 32256, while the sum is 34.

The square root of 820422673 is about 28643.0213664690. The cubic root of 820422673 is about 936.1509549218.

The spelling of 820422673 in words is "eight hundred twenty million, four hundred twenty-two thousand, six hundred seventy-three".