689931988417 has 8 divisors (see below), whose sum is σ = 799294985216. Its totient is φ = 583269312672.

The previous prime is 689931988399. The next prime is 689931988433. The reversal of 689931988417 is 714889139986.

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 689931988417 - 2⁷ = 689931988289 is a prime.

It is a super-2 number, since 2×689931988417² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (73).

It is a self number, because there is not a number n which added to its sum of digits gives 689931988417.

It is not an unprimeable number, because it can be changed into a prime (689931388417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 675079713 + ... + 675080734.

It is an arithmetic number, because the mean of its divisors is an integer number (99911873152).

Almost surely, 2^689931988417 is an apocalyptic number.

It is an amenable number.

689931988417 is a deficient number, since it is larger than the sum of its proper divisors (109362996799).

689931988417 is a wasteful number, since it uses less digits than its factorization.

689931988417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1350160527.

The product of its digits is 188116992, while the sum is 73.

The spelling of 689931988417 in words is "six hundred eighty-nine billion, nine hundred thirty-one million, nine hundred eighty-eight thousand, four hundred seventeen".