689487223 has 2 divisors, whose sum is σ = 689487224. Its totient is φ = 689487222.

The previous prime is 689487221. The next prime is 689487247. The reversal of 689487223 is 322784986.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 689487223 - 2¹ = 689487221 is a prime.

It is a super-3 number, since 3×689487223³ (a number of 27 digits) contains 333 as substring.

Together with 689487221, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (689487221) 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, 344743611 + 344743612.

It is an arithmetic number, because the mean of its divisors is an integer number (344743612).

Almost surely, 2^689487223 is an apocalyptic number.

689487223 is a deficient number, since it is larger than the sum of its proper divisors (1).

689487223 is an equidigital number, since it uses as much as digits as its factorization.

689487223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1161216, while the sum is 49.

The square root of 689487223 is about 26258.0887156701. The cubic root of 689487223 is about 883.4366402811.

The spelling of 689487223 in words is "six hundred eighty-nine million, four hundred eighty-seven thousand, two hundred twenty-three".