68118587 has 4 divisors (see below), whose sum is σ = 68238456. Its totient is φ = 67998720.

The previous prime is 68118581. The next prime is 68118637. The reversal of 68118587 is 78581186.

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 68118587 - 2⁸ = 68118331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68118581) 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, 59078 + ... + 60219.

It is an arithmetic number, because the mean of its divisors is an integer number (17059614).

Almost surely, 2^68118587 is an apocalyptic number.

68118587 is a deficient number, since it is larger than the sum of its proper divisors (119869).

68118587 is a wasteful number, since it uses less digits than its factorization.

68118587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119868.

The product of its digits is 107520, while the sum is 44.

The square root of 68118587 is about 8253.3985121282. The cubic root of 68118587 is about 408.4026426105.

The spelling of 68118587 in words is "sixty-eight million, one hundred eighteen thousand, five hundred eighty-seven".