422209397 has 2 divisors, whose sum is σ = 422209398. Its totient is φ = 422209396.

The previous prime is 422209387. The next prime is 422209493. The reversal of 422209397 is 793902224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 281098756 + 141110641 = 16766^2 + 11879^2 .

It is a cyclic number.

It is not a de Polignac number, because 422209397 - 2¹⁰ = 422208373 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 422209397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (422209357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211104698 + 211104699.

It is an arithmetic number, because the mean of its divisors is an integer number (211104699).

Almost surely, 2^422209397 is an apocalyptic number.

It is an amenable number.

422209397 is a deficient number, since it is larger than the sum of its proper divisors (1).

422209397 is an equidigital number, since it uses as much as digits as its factorization.

422209397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 422209397 is about 20547.7345953270. The cubic root of 422209397 is about 750.1981088511.

The spelling of 422209397 in words is "four hundred twenty-two million, two hundred nine thousand, three hundred ninety-seven".