68813889 has 16 divisors (see below), whose sum is σ = 95031552. Its totient is φ = 44262288.

The previous prime is 68813887. The next prime is 68813911. The reversal of 68813889 is 98831886.

It is a happy number.

It is not a de Polignac number, because 68813889 - 2¹ = 68813887 is a prime.

It is a super-3 number, since 3×68813889³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (68813887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7494 + ... + 13920.

It is an arithmetic number, because the mean of its divisors is an integer number (5939472).

Almost surely, 2^68813889 is an apocalyptic number.

It is an amenable number.

68813889 is a deficient number, since it is larger than the sum of its proper divisors (26217663).

68813889 is a wasteful number, since it uses less digits than its factorization.

68813889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6556.

The product of its digits is 663552, while the sum is 51.

The square root of 68813889 is about 8295.4137329008. The cubic root of 68813889 is about 409.7874944765.

The spelling of 68813889 in words is "sixty-eight million, eight hundred thirteen thousand, eight hundred eighty-nine".