689434677717 has 16 divisors (see below), whose sum is σ = 930331656000. Its totient is φ = 454088818304.

The previous prime is 689434677707. The next prime is 689434677721. The reversal of 689434677717 is 717776434986.

It is a cyclic number.

It is not a de Polignac number, because 689434677717 - 2⁶ = 689434677653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689434677707) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 722367 + ... + 1378652.

It is an arithmetic number, because the mean of its divisors is an integer number (58145728500).

Almost surely, 2^689434677717 is an apocalyptic number.

It is an amenable number.

689434677717 is a deficient number, since it is larger than the sum of its proper divisors (240896978283).

689434677717 is a wasteful number, since it uses less digits than its factorization.

689434677717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2102340.

The product of its digits is 298722816, while the sum is 69.

The spelling of 689434677717 in words is "six hundred eighty-nine billion, four hundred thirty-four million, six hundred seventy-seven thousand, seven hundred seventeen".