219419489 has 2 divisors, whose sum is σ = 219419490. Its totient is φ = 219419488.

The previous prime is 219419477. The next prime is 219419503. The reversal of 219419489 is 984914912.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 218803264 + 616225 = 14792^2 + 785^2 .

It is a cyclic number.

It is not a de Polignac number, because 219419489 - 2¹² = 219415393 is a prime.

It is a super-2 number, since 2×219419489² = 96289824306042242, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (219419089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109709744 + 109709745.

It is an arithmetic number, because the mean of its divisors is an integer number (109709745).

Almost surely, 2^219419489 is an apocalyptic number.

It is an amenable number.

219419489 is a deficient number, since it is larger than the sum of its proper divisors (1).

219419489 is an equidigital number, since it uses as much as digits as its factorization.

219419489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 47.

The square root of 219419489 is about 14812.8150261859. The cubic root of 219419489 is about 603.1496309627.

The spelling of 219419489 in words is "two hundred nineteen million, four hundred nineteen thousand, four hundred eighty-nine".