422340409 has 2 divisors, whose sum is σ = 422340410. Its totient is φ = 422340408.

The previous prime is 422340407. The next prime is 422340419. The reversal of 422340409 is 904043224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 259854400 + 162486009 = 16120^2 + 12747^2 .

It is a cyclic number.

It is not a de Polignac number, because 422340409 - 2¹ = 422340407 is a prime.

Together with 422340407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (422340403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211170204 + 211170205.

It is an arithmetic number, because the mean of its divisors is an integer number (211170205).

Almost surely, 2^422340409 is an apocalyptic number.

It is an amenable number.

422340409 is a deficient number, since it is larger than the sum of its proper divisors (1).

422340409 is an equidigital number, since it uses as much as digits as its factorization.

422340409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 422340409 is about 20550.9223393988. The cubic root of 422340409 is about 750.2756965687.

The spelling of 422340409 in words is "four hundred twenty-two million, three hundred forty thousand, four hundred nine".