706908689 has 2 divisors, whose sum is σ = 706908690. Its totient is φ = 706908688.

The previous prime is 706908667. The next prime is 706908707. The reversal of 706908689 is 986809607.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 484660225 + 222248464 = 22015^2 + 14908^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-706908689 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 706908689.

It is not a weakly prime, because it can be changed into another prime (706908989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 353454344 + 353454345.

It is an arithmetic number, because the mean of its divisors is an integer number (353454345).

Almost surely, 2^706908689 is an apocalyptic number.

It is an amenable number.

706908689 is a deficient number, since it is larger than the sum of its proper divisors (1).

706908689 is an equidigital number, since it uses as much as digits as its factorization.

706908689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 53.

The square root of 706908689 is about 26587.7544933753. The cubic root of 706908689 is about 890.8155168652.

The spelling of 706908689 in words is "seven hundred six million, nine hundred eight thousand, six hundred eighty-nine".