68889687 has 8 divisors (see below), whose sum is σ = 96687360. Its totient is φ = 43509240.

The previous prime is 68889683. The next prime is 68889697. The reversal of 68889687 is 78698886.

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

It is not a de Polignac number, because 68889687 - 2² = 68889683 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68889687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68889683) 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, 604239 + ... + 604352.

It is an arithmetic number, because the mean of its divisors is an integer number (12085920).

Almost surely, 2^68889687 is an apocalyptic number.

68889687 is a deficient number, since it is larger than the sum of its proper divisors (27797673).

68889687 is a wasteful number, since it uses less digits than its factorization.

68889687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1208613.

The product of its digits is 9289728, while the sum is 60.

The square root of 68889687 is about 8299.9811445569. The cubic root of 68889687 is about 409.9378985854.

The spelling of 68889687 in words is "sixty-eight million, eight hundred eighty-nine thousand, six hundred eighty-seven".