422648791 has 2 divisors, whose sum is σ = 422648792. Its totient is φ = 422648790.

The previous prime is 422648789. The next prime is 422648827. The reversal of 422648791 is 197846224.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 422648791 - 2¹ = 422648789 is a prime.

It is a super-3 number, since 3×422648791³ (a number of 27 digits) contains 333 as substring.

Together with 422648789, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (422648701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211324395 + 211324396.

It is an arithmetic number, because the mean of its divisors is an integer number (211324396).

Almost surely, 2^422648791 is an apocalyptic number.

422648791 is a deficient number, since it is larger than the sum of its proper divisors (1).

422648791 is an equidigital number, since it uses as much as digits as its factorization.

422648791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 43.

The square root of 422648791 is about 20558.4238452270. The cubic root of 422648791 is about 750.4582627515.

The spelling of 422648791 in words is "four hundred twenty-two million, six hundred forty-eight thousand, seven hundred ninety-one".