999989219 has 2 divisors, whose sum is σ = 999989220. Its totient is φ = 999989218.

The previous prime is 999989203. The next prime is 999989231. The reversal of 999989219 is 912989999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 999989219 - 2⁴ = 999989203 is a prime.

It is a super-2 number, since 2×999989219² = 1999956876232459922, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (999989299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499994609 + 499994610.

It is an arithmetic number, because the mean of its divisors is an integer number (499994610).

Almost surely, 2^999989219 is an apocalyptic number.

999989219 is a deficient number, since it is larger than the sum of its proper divisors (1).

999989219 is an equidigital number, since it uses as much as digits as its factorization.

999989219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8503056, while the sum is 65.

The square root of 999989219 is about 31622.6061386471. The cubic root of 999989219 is about 999.9964063204.

The spelling of 999989219 in words is "nine hundred ninety-nine million, nine hundred eighty-nine thousand, two hundred nineteen".