422689 has 2 divisors, whose sum is σ = 422690. Its totient is φ = 422688.

The previous prime is 422657. The next prime is 422701. The reversal of 422689 is 986224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 242064 + 180625 = 492^2 + 425^2 .

It is a cyclic number.

It is not a de Polignac number, because 422689 - 2⁵ = 422657 is a prime.

It is a Chen prime.

It is a d-powerful number, because it can be written as 4⁶ + 2⁹ + 6⁷ + 2¹⁷ + 8³ + 9⁴ .

It is a self number, because there is not a number n which added to its sum of digits gives 422689.

It is not a weakly prime, because it can be changed into another prime (422089) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211344 + 211345.

It is an arithmetic number, because the mean of its divisors is an integer number (211345).

2⁴²²⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

422689 is a deficient number, since it is larger than the sum of its proper divisors (1).

422689 is an equidigital number, since it uses as much as digits as its factorization.

422689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 31.

The square root of 422689 is about 650.1453683600. The cubic root of 422689 is about 75.0482060461.

It can be divided in two parts, 422 and 689, that added together give a palindrome (1111).

The spelling of 422689 in words is "four hundred twenty-two thousand, six hundred eighty-nine".