419985817 has 2 divisors, whose sum is σ = 419985818. Its totient is φ = 419985816.

The previous prime is 419985739. The next prime is 419985821. The reversal of 419985817 is 718589914.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 292273216 + 127712601 = 17096^2 + 11301^2 .

It is a cyclic number.

It is not a de Polignac number, because 419985817 - 2¹¹ = 419983769 is a prime.

It is not a weakly prime, because it can be changed into another prime (419985827) 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, 209992908 + 209992909.

It is an arithmetic number, because the mean of its divisors is an integer number (209992909).

Almost surely, 2^419985817 is an apocalyptic number.

It is an amenable number.

419985817 is a deficient number, since it is larger than the sum of its proper divisors (1).

419985817 is an equidigital number, since it uses as much as digits as its factorization.

419985817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 52.

The square root of 419985817 is about 20493.5554992295. Note that the first 3 decimals coincide. The cubic root of 419985817 is about 748.8788088907.

The spelling of 419985817 in words is "four hundred nineteen million, nine hundred eighty-five thousand, eight hundred seventeen".