68888889 has 12 divisors (see below), whose sum is σ = 104743600. Its totient is φ = 43508664.

The previous prime is 68888873. The next prime is 68888893. The reversal of 68888889 is 98888886.

It is not a de Polignac number, because 68888889 - 2⁴ = 68888873 is a prime.

68888889 is a strobogrammatic number because it is the same when read upside-down.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (68888849) 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, 201259 + ... + 201600.

Almost surely, 2^68888889 is an apocalyptic number.

It is an amenable number.

68888889 is a deficient number, since it is larger than the sum of its proper divisors (35854711).

68888889 is a wasteful number, since it uses less digits than its factorization.

68888889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402884 (or 402881 counting only the distinct ones).

The product of its digits is 14155776, while the sum is 63.

The square root of 68888889 is about 8299.9330720193. The cubic root of 68888889 is about 409.9363157084.

The spelling of 68888889 in words is "sixty-eight million, eight hundred eighty-eight thousand, eight hundred eighty-nine".