68130817 has 4 divisors (see below), whose sum is σ = 68157700. Its totient is φ = 68103936.

The previous prime is 68130809. The next prime is 68130833. The reversal of 68130817 is 71803186.

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

It can be written as a sum of positive squares in 2 ways, for example, as 30074256 + 38056561 = 5484^2 + 6169^2 .

It is a cyclic number.

It is not a de Polignac number, because 68130817 - 2³ = 68130809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68130317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9192 + ... + 14857.

It is an arithmetic number, because the mean of its divisors is an integer number (17039425).

Almost surely, 2^68130817 is an apocalyptic number.

It is an amenable number.

68130817 is a deficient number, since it is larger than the sum of its proper divisors (26883).

68130817 is a wasteful number, since it uses less digits than its factorization.

68130817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26882.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 68130817 is about 8254.1393857870. The cubic root of 68130817 is about 408.4270826625.

The spelling of 68130817 in words is "sixty-eight million, one hundred thirty thousand, eight hundred seventeen".