689417219 has 2 divisors, whose sum is σ = 689417220. Its totient is φ = 689417218.

The previous prime is 689417177. The next prime is 689417221. The reversal of 689417219 is 912714986.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-689417219 is a prime.

It is a super-2 number, since 2×689417219² = 950592203707387922, which contains 22 as substring.

Together with 689417221, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (689417719) 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, 344708609 + 344708610.

It is an arithmetic number, because the mean of its divisors is an integer number (344708610).

Almost surely, 2^689417219 is an apocalyptic number.

689417219 is a deficient number, since it is larger than the sum of its proper divisors (1).

689417219 is an equidigital number, since it uses as much as digits as its factorization.

689417219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 47.

The square root of 689417219 is about 26256.7556830618. The cubic root of 689417219 is about 883.4067406737.

The spelling of 689417219 in words is "six hundred eighty-nine million, four hundred seventeen thousand, two hundred nineteen".