422787947 has 4 divisors (see below), whose sum is σ = 425625600. Its totient is φ = 419950296.

The previous prime is 422787931. The next prime is 422787949. The reversal of 422787947 is 749787224.

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 422787947 - 2⁴ = 422787931 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 422787895 and 422787904.

It is not an unprimeable number, because it can be changed into a prime (422787949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1418603 + ... + 1418900.

It is an arithmetic number, because the mean of its divisors is an integer number (106406400).

Almost surely, 2^422787947 is an apocalyptic number.

422787947 is a deficient number, since it is larger than the sum of its proper divisors (2837653).

422787947 is a wasteful number, since it uses less digits than its factorization.

422787947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2837652.

The product of its digits is 1580544, while the sum is 50.

The square root of 422787947 is about 20561.8079701178. The cubic root of 422787947 is about 750.5406158487.

The spelling of 422787947 in words is "four hundred twenty-two million, seven hundred eighty-seven thousand, nine hundred forty-seven".