68716689 has 8 divisors (see below), whose sum is σ = 94781760. Its totient is φ = 44231376.

The previous prime is 68716619. The next prime is 68716691. The reversal of 68716689 is 98661786.

It is a happy number.

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

It is not a de Polignac number, because 68716689 - 2¹¹ = 68714641 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (68716619) 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, 394837 + ... + 395010.

It is an arithmetic number, because the mean of its divisors is an integer number (11847720).

Almost surely, 2^68716689 is an apocalyptic number.

It is an amenable number.

68716689 is a deficient number, since it is larger than the sum of its proper divisors (26065071).

68716689 is a wasteful number, since it uses less digits than its factorization.

68716689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789879.

The product of its digits is 870912, while the sum is 51.

The square root of 68716689 is about 8289.5530036305. The cubic root of 68716689 is about 409.5944611913.

The spelling of 68716689 in words is "sixty-eight million, seven hundred sixteen thousand, six hundred eighty-nine".