422679 has 4 divisors (see below), whose sum is σ = 563576. Its totient is φ = 281784.

The previous prime is 422657. The next prime is 422689. The reversal of 422679 is 976224.

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 422679 - 2⁷ = 422551 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 422679.

It is not an unprimeable number, because it can be changed into a prime (422689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70444 + ... + 70449.

It is an arithmetic number, because the mean of its divisors is an integer number (140894).

2⁴²²⁶⁷⁹ is an apocalyptic number.

422679 is a deficient number, since it is larger than the sum of its proper divisors (140897).

422679 is a wasteful number, since it uses less digits than its factorization.

422679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140896.

The product of its digits is 6048, while the sum is 30.

The square root of 422679 is about 650.1376777268. The cubic root of 422679 is about 75.0476142099.

The spelling of 422679 in words is "four hundred twenty-two thousand, six hundred seventy-nine".