691717117 has 8 divisors (see below), whose sum is σ = 851344256. Its totient is φ = 547292592.

The previous prime is 691717093. The next prime is 691717139. The reversal of 691717117 is 711717196.

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

It is not a de Polignac number, because 691717117 - 2¹⁹ = 691192829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 691717117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (691717417) 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, 3800553 + ... + 3800734.

It is an arithmetic number, because the mean of its divisors is an integer number (106418032).

Almost surely, 2^691717117 is an apocalyptic number.

It is an amenable number.

691717117 is a deficient number, since it is larger than the sum of its proper divisors (159627139).

691717117 is a wasteful number, since it uses less digits than its factorization.

691717117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7601307.

The product of its digits is 18522, while the sum is 40.

The square root of 691717117 is about 26300.5155272668. The cubic root of 691717117 is about 884.3879995376.

The spelling of 691717117 in words is "six hundred ninety-one million, seven hundred seventeen thousand, one hundred seventeen".