688702117 has 8 divisors (see below), whose sum is σ = 695447424. Its totient is φ = 681968448.

The previous prime is 688702109. The next prime is 688702129. The reversal of 688702117 is 711207886.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 688702117 - 2³ = 688702109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 688702117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688702517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158658 + ... + 162940.

It is an arithmetic number, because the mean of its divisors is an integer number (86930928).

Almost surely, 2^688702117 is an apocalyptic number.

It is an amenable number.

688702117 is a deficient number, since it is larger than the sum of its proper divisors (6745307).

688702117 is a wasteful number, since it uses less digits than its factorization.

688702117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5819.

The product of its (nonzero) digits is 37632, while the sum is 40.

The square root of 688702117 is about 26243.1346641364. The cubic root of 688702117 is about 883.1011954219.

The spelling of 688702117 in words is "six hundred eighty-eight million, seven hundred two thousand, one hundred seventeen".