422309689 has 2 divisors, whose sum is σ = 422309690. Its totient is φ = 422309688.

The previous prime is 422309677. The next prime is 422309729. The reversal of 422309689 is 986903224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 421604089 + 705600 = 20533^2 + 840^2 .

It is a cyclic number.

It is not a de Polignac number, because 422309689 - 2¹⁹ = 421785401 is a prime.

It is not a weakly prime, because it can be changed into another prime (422309609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211154844 + 211154845.

It is an arithmetic number, because the mean of its divisors is an integer number (211154845).

Almost surely, 2^422309689 is an apocalyptic number.

It is an amenable number.

422309689 is a deficient number, since it is larger than the sum of its proper divisors (1).

422309689 is an equidigital number, since it uses as much as digits as its factorization.

422309689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 422309689 is about 20550.1749140974. The cubic root of 422309689 is about 750.2575050596.

The spelling of 422309689 in words is "four hundred twenty-two million, three hundred nine thousand, six hundred eighty-nine".