990839219 has 2 divisors, whose sum is σ = 990839220. Its totient is φ = 990839218.

The previous prime is 990839197. The next prime is 990839231. The reversal of 990839219 is 912938099.

990839219 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (912938099) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 990839219 - 2¹⁶ = 990773683 is a prime.

It is a super-2 number, since 2×990839219² = 1963524715817059922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (990839299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495419609 + 495419610.

It is an arithmetic number, because the mean of its divisors is an integer number (495419610).

Almost surely, 2^990839219 is an apocalyptic number.

990839219 is a deficient number, since it is larger than the sum of its proper divisors (1).

990839219 is an equidigital number, since it uses as much as digits as its factorization.

990839219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 314928, while the sum is 50.

The square root of 990839219 is about 31477.5986854144. The cubic root of 990839219 is about 996.9370341522.

The spelling of 990839219 in words is "nine hundred ninety million, eight hundred thirty-nine thousand, two hundred nineteen".