689751268 has 12 divisors (see below), whose sum is σ = 1278068652. Its totient is φ = 324588800.

The previous prime is 689751259. The next prime is 689751277. The reversal of 689751268 is 862157986.

It is an interprime number because it is at equal distance from previous prime (689751259) and next prime (689751277).

It can be written as a sum of positive squares in 2 ways, for example, as 302133924 + 387617344 = 17382^2 + 19688^2 .

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 5071633 + ... + 5071768.

It is an arithmetic number, because the mean of its divisors is an integer number (106505721).

Almost surely, 2^689751268 is an apocalyptic number.

689751268 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

689751268 is a deficient number, since it is larger than the sum of its proper divisors (588317384).

689751268 is a wasteful number, since it uses less digits than its factorization.

689751268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10143422 (or 10143420 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 52.

The square root of 689751268 is about 26263.1161136679. The cubic root of 689751268 is about 883.5493990817.

The spelling of 689751268 in words is "six hundred eighty-nine million, seven hundred fifty-one thousand, two hundred sixty-eight".