422787109 has 4 divisors (see below), whose sum is σ = 422843040. Its totient is φ = 422731180.

The previous prime is 422787047. The next prime is 422787119. The reversal of 422787109 is 901787224.

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 422787109 - 2⁹ = 422786597 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422787119) 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, 14449 + ... + 32470.

It is an arithmetic number, because the mean of its divisors is an integer number (105710760).

Almost surely, 2^422787109 is an apocalyptic number.

It is an amenable number.

422787109 is a deficient number, since it is larger than the sum of its proper divisors (55931).

422787109 is an equidigital number, since it uses as much as digits as its factorization.

422787109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55930.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 422787109 is about 20561.7875925222. The cubic root of 422787109 is about 750.5401199709.

The spelling of 422787109 in words is "four hundred twenty-two million, seven hundred eighty-seven thousand, one hundred nine".