689317686 has 24 divisors (see below), whose sum is σ = 1494543960. Its totient is φ = 229615296.

The previous prime is 689317667. The next prime is 689317687. The reversal of 689317686 is 686713986.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689317687) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15625 + ... + 40283.

It is an arithmetic number, because the mean of its divisors is an integer number (62272665).

Almost surely, 2^689317686 is an apocalyptic number.

689317686 is an abundant number, since it is smaller than the sum of its proper divisors (805226274).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

689317686 is a wasteful number, since it uses less digits than its factorization.

689317686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26220 (or 26217 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The square root of 689317686 is about 26254.8602357735. The cubic root of 689317686 is about 883.3642253664.

The spelling of 689317686 in words is "six hundred eighty-nine million, three hundred seventeen thousand, six hundred eighty-six".