422789 has 2 divisors, whose sum is σ = 422790. Its totient is φ = 422788.

The previous prime is 422761. The next prime is 422797. The reversal of 422789 is 987224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 422500 + 289 = 650^2 + 17^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-422789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (422749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211394 + 211395.

It is an arithmetic number, because the mean of its divisors is an integer number (211395).

2⁴²²⁷⁸⁹ is an apocalyptic number.

It is an amenable number.

422789 is a deficient number, since it is larger than the sum of its proper divisors (1).

422789 is an equidigital number, since it uses as much as digits as its factorization.

422789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 32.

The square root of 422789 is about 650.2222696894. Note that the first 4 decimals coincide. The cubic root of 422789 is about 75.0541238950.

The spelling of 422789 in words is "four hundred twenty-two thousand, seven hundred eighty-nine".