990199219 has 2 divisors, whose sum is σ = 990199220. Its totient is φ = 990199218.

The previous prime is 990199211. The next prime is 990199283. The reversal of 990199219 is 912991099.

It is a weak prime.

It is an emirp because it is prime and its reverse (912991099) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 990199219 - 2³ = 990199211 is a prime.

It is a super-2 number, since 2×990199219² = 1960988986616419922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (990199211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495099609 + 495099610.

It is an arithmetic number, because the mean of its divisors is an integer number (495099610).

Almost surely, 2^990199219 is an apocalyptic number.

990199219 is a deficient number, since it is larger than the sum of its proper divisors (1).

990199219 is an equidigital number, since it uses as much as digits as its factorization.

990199219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 118098, while the sum is 49.

The square root of 990199219 is about 31467.4310835823. The cubic root of 990199219 is about 996.7223416934.

The spelling of 990199219 in words is "nine hundred ninety million, one hundred ninety-nine thousand, two hundred nineteen".