68416689 has 8 divisors (see below), whose sum is σ = 99515232. Its totient is φ = 41464640.

The previous prime is 68416681. The next prime is 68416709. The reversal of 68416689 is 98661486.

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 68416689 - 2³ = 68416681 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (68416681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1036584 + ... + 1036649.

It is an arithmetic number, because the mean of its divisors is an integer number (12439404).

Almost surely, 2^68416689 is an apocalyptic number.

It is an amenable number.

68416689 is a deficient number, since it is larger than the sum of its proper divisors (31098543).

68416689 is a wasteful number, since it uses less digits than its factorization.

68416689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2073247.

The product of its digits is 497664, while the sum is 48.

The square root of 68416689 is about 8271.4381458124. The cubic root of 68416689 is about 408.9975290928.

It can be divided in two parts, 6841 and 6689, that added together give a triangular number (13530 = T₁₆₄).

The spelling of 68416689 in words is "sixty-eight million, four hundred sixteen thousand, six hundred eighty-nine".