68228989 has 4 divisors (see below), whose sum is σ = 68282656. Its totient is φ = 68175324.

The previous prime is 68228969. The next prime is 68229013. The reversal of 68228989 is 98982286.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68228989 - 2¹¹ = 68226941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68228959) 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 3 ways as a sum of consecutive naturals, for example, 24879 + ... + 27484.

It is an arithmetic number, because the mean of its divisors is an integer number (17070664).

Almost surely, 2^68228989 is an apocalyptic number.

It is an amenable number.

68228989 is a deficient number, since it is larger than the sum of its proper divisors (53667).

68228989 is a wasteful number, since it uses less digits than its factorization.

68228989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53666.

The product of its digits is 995328, while the sum is 52.

The square root of 68228989 is about 8260.0840794752. The cubic root of 68228989 is about 408.6231606495.

The spelling of 68228989 in words is "sixty-eight million, two hundred twenty-eight thousand, nine hundred eighty-nine".