997219 has 2 divisors, whose sum is σ = 997220. Its totient is φ = 997218.

The previous prime is 997207. The next prime is 997247. The reversal of 997219 is 912799.

It is a weak prime.

It is an emirp because it is prime and its reverse (912799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 997219 - 2⁷ = 997091 is a prime.

It is a super-2 number, since 2×997219² = 1988891467922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (997259) 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, 498609 + 498610.

It is an arithmetic number, because the mean of its divisors is an integer number (498610).

2⁹⁹⁷²¹⁹ is an apocalyptic number.

997219 is a deficient number, since it is larger than the sum of its proper divisors (1).

997219 is an equidigital number, since it uses as much as digits as its factorization.

997219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10206, while the sum is 37.

The square root of 997219 is about 998.6085319083. The cubic root of 997219 is about 99.9072139341.

The spelling of 997219 in words is "nine hundred ninety-seven thousand, two hundred nineteen".