68136817 has 8 divisors (see below), whose sum is σ = 79147712. Its totient is φ = 57445200.

The previous prime is 68136797. The next prime is 68136823. The reversal of 68136817 is 71863186.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68136817 - 2²³ = 59748209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68136817.

It is not an unprimeable number, because it can be changed into a prime (68136847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79359 + ... + 80212.

It is an arithmetic number, because the mean of its divisors is an integer number (9893464).

Almost surely, 2^68136817 is an apocalyptic number.

It is an amenable number.

68136817 is a deficient number, since it is larger than the sum of its proper divisors (11010895).

68136817 is a wasteful number, since it uses less digits than its factorization.

68136817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159639.

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

The square root of 68136817 is about 8254.5028317882. The cubic root of 68136817 is about 408.4390718067.

The spelling of 68136817 in words is "sixty-eight million, one hundred thirty-six thousand, eight hundred seventeen".