422138673 has 12 divisors (see below), whose sum is σ = 665188368. Its totient is φ = 255841560.

The previous prime is 422138663. The next prime is 422138677. The reversal of 422138673 is 376831224.

It is a happy number.

It is not a de Polignac number, because 422138673 - 2⁴ = 422138657 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (422138677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2131915 + ... + 2132112.

It is an arithmetic number, because the mean of its divisors is an integer number (55432364).

Almost surely, 2^422138673 is an apocalyptic number.

It is an amenable number.

422138673 is a deficient number, since it is larger than the sum of its proper divisors (243049695).

422138673 is a wasteful number, since it uses less digits than its factorization.

422138673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4264044 (or 4264041 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 422138673 is about 20546.0135549454. The cubic root of 422138673 is about 750.1562181256.

Adding to 422138673 its reverse (376831224), we get a palindrome (798969897).

The spelling of 422138673 in words is "four hundred twenty-two million, one hundred thirty-eight thousand, six hundred seventy-three".