68085517 has 4 divisors (see below), whose sum is σ = 70281856. Its totient is φ = 65889180.

The previous prime is 68085499. The next prime is 68085571. The reversal of 68085517 is 71558086.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71558086 = 2 ⋅35779043.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68085517 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68085517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68085317) 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, 1098123 + ... + 1098184.

It is an arithmetic number, because the mean of its divisors is an integer number (17570464).

Almost surely, 2^68085517 is an apocalyptic number.

It is an amenable number.

68085517 is a deficient number, since it is larger than the sum of its proper divisors (2196339).

68085517 is a wasteful number, since it uses less digits than its factorization.

68085517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2196338.

The product of its (nonzero) digits is 67200, while the sum is 40.

The square root of 68085517 is about 8251.3948517811. The cubic root of 68085517 is about 408.3365418971.

The spelling of 68085517 in words is "sixty-eight million, eighty-five thousand, five hundred seventeen".