706689 has 12 divisors (see below), whose sum is σ = 1028196. Its totient is φ = 467712.

The previous prime is 706679. The next prime is 706703. The reversal of 706689 is 986607.

It can be written as a sum of positive squares in 2 ways, for example, as 166464 + 540225 = 408^2 + 735^2 .

It is not a de Polignac number, because 706689 - 2⁷ = 706561 is a prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (706669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1929 + ... + 2265.

It is an arithmetic number, because the mean of its divisors is an integer number (85683).

2⁷⁰⁶⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

706689 is a deficient number, since it is larger than the sum of its proper divisors (321507).

706689 is a wasteful number, since it uses less digits than its factorization.

706689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576 (or 573 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 706689 is about 840.6479643703. The cubic root of 706689 is about 89.0723226470.

The spelling of 706689 in words is "seven hundred six thousand, six hundred eighty-nine".