68113687 has 4 divisors (see below), whose sum is σ = 68285656. Its totient is φ = 67941720.

The previous prime is 68113673. The next prime is 68113709. The reversal of 68113687 is 78631186.

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 68113687 - 2²³ = 59725079 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 (68113627) 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, 85389 + ... + 86182.

It is an arithmetic number, because the mean of its divisors is an integer number (17071414).

Almost surely, 2^68113687 is an apocalyptic number.

68113687 is a deficient number, since it is larger than the sum of its proper divisors (171969).

68113687 is a wasteful number, since it uses less digits than its factorization.

68113687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171968.

The product of its digits is 48384, while the sum is 40.

The square root of 68113687 is about 8253.1016593763. The cubic root of 68113687 is about 408.3928497819.

The spelling of 68113687 in words is "sixty-eight million, one hundred thirteen thousand, six hundred eighty-seven".