422648657 has 4 divisors (see below), whose sum is σ = 427998720. Its totient is φ = 417298596.

The previous prime is 422648647. The next prime is 422648671. The reversal of 422648657 is 756846224.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 422648657 - 2⁴ = 422648641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (422648647) 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 3 ways as a sum of consecutive naturals, for example, 2674913 + ... + 2675070.

It is an arithmetic number, because the mean of its divisors is an integer number (106999680).

Almost surely, 2^422648657 is an apocalyptic number.

It is an amenable number.

422648657 is a deficient number, since it is larger than the sum of its proper divisors (5350063).

422648657 is an equidigital number, since it uses as much as digits as its factorization.

422648657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5350062.

The product of its digits is 645120, while the sum is 44.

The square root of 422648657 is about 20558.4205862221. The cubic root of 422648657 is about 750.4581834410.

The spelling of 422648657 in words is "four hundred twenty-two million, six hundred forty-eight thousand, six hundred fifty-seven".