422388787 has 2 divisors, whose sum is σ = 422388788. Its totient is φ = 422388786.

The previous prime is 422388779. The next prime is 422388793. The reversal of 422388787 is 787883224.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 422388787 - 2³ = 422388779 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 422388787.

It is not a weakly prime, because it can be changed into another prime (422388797) 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 as a sum of consecutive naturals, namely, 211194393 + 211194394.

It is an arithmetic number, because the mean of its divisors is an integer number (211194394).

Almost surely, 2^422388787 is an apocalyptic number.

422388787 is a deficient number, since it is larger than the sum of its proper divisors (1).

422388787 is an equidigital number, since it uses as much as digits as its factorization.

422388787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1204224, while the sum is 49.

The square root of 422388787 is about 20552.0993331582. The cubic root of 422388787 is about 750.3043428542.

The spelling of 422388787 in words is "four hundred twenty-two million, three hundred eighty-eight thousand, seven hundred eighty-seven".