422289647 has 4 divisors (see below), whose sum is σ = 454773480. Its totient is φ = 389805816.

The previous prime is 422289643. The next prime is 422289667. The reversal of 422289647 is 746982224.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 422289647 - 2² = 422289643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 422289598 and 422289607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422289643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16241897 + ... + 16241922.

It is an arithmetic number, because the mean of its divisors is an integer number (113693370).

Almost surely, 2^422289647 is an apocalyptic number.

422289647 is a deficient number, since it is larger than the sum of its proper divisors (32483833).

422289647 is a wasteful number, since it uses less digits than its factorization.

422289647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32483832.

The product of its digits is 387072, while the sum is 44.

The square root of 422289647 is about 20549.6872725596. The cubic root of 422289647 is about 750.2456362824.

The spelling of 422289647 in words is "four hundred twenty-two million, two hundred eighty-nine thousand, six hundred forty-seven".