689899349 has 2 divisors, whose sum is σ = 689899350. Its totient is φ = 689899348.

The previous prime is 689899313. The next prime is 689899393. The reversal of 689899349 is 943998986.

689899349 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 353176849 + 336722500 = 18793^2 + 18350^2 .

It is a cyclic number.

It is not a de Polignac number, because 689899349 - 2²⁸ = 421463893 is a prime.

It is a super-2 number, since 2×689899349² = 951922223501247602, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (689899649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344949674 + 344949675.

It is an arithmetic number, because the mean of its divisors is an integer number (344949675).

Almost surely, 2^689899349 is an apocalyptic number.

It is an amenable number.

689899349 is a deficient number, since it is larger than the sum of its proper divisors (1).

689899349 is an equidigital number, since it uses as much as digits as its factorization.

689899349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30233088, while the sum is 65.

The square root of 689899349 is about 26265.9351442129. The cubic root of 689899349 is about 883.6126235718.

The spelling of 689899349 in words is "six hundred eighty-nine million, eight hundred ninety-nine thousand, three hundred forty-nine".