422779 has 4 divisors (see below), whose sum is σ = 483184. Its totient is φ = 362376.

The previous prime is 422761. The next prime is 422789. The reversal of 422779 is 977224.

It is a happy number.

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

It is not a de Polignac number, because 422779 - 2⁹ = 422267 is a prime.

It is a Duffinian number.

422779 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 422779.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422749) 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, 30192 + ... + 30205.

It is an arithmetic number, because the mean of its divisors is an integer number (120796).

2⁴²²⁷⁷⁹ is an apocalyptic number.

422779 is a deficient number, since it is larger than the sum of its proper divisors (60405).

422779 is an equidigital number, since it uses as much as digits as its factorization.

422779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60404.

The product of its digits is 7056, while the sum is 31.

The square root of 422779 is about 650.2145799657. The cubic root of 422779 is about 75.0535321521.

The spelling of 422779 in words is "four hundred twenty-two thousand, seven hundred seventy-nine".