68128927 has 4 divisors (see below), whose sum is σ = 71714680. Its totient is φ = 64543176.

The previous prime is 68128919. The next prime is 68128937. The reversal of 68128927 is 72982186.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68128927 - 2³ = 68128919 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 (68128937) 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, 1792848 + ... + 1792885.

It is an arithmetic number, because the mean of its divisors is an integer number (17928670).

Almost surely, 2^68128927 is an apocalyptic number.

68128927 is a deficient number, since it is larger than the sum of its proper divisors (3585753).

68128927 is a wasteful number, since it uses less digits than its factorization.

68128927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3585752.

The product of its digits is 96768, while the sum is 43.

The square root of 68128927 is about 8254.0248969821. The cubic root of 68128927 is about 408.4233059363.

The spelling of 68128927 in words is "sixty-eight million, one hundred twenty-eight thousand, nine hundred twenty-seven".