68087617 has 4 divisors (see below), whose sum is σ = 73325140. Its totient is φ = 62850096.

The previous prime is 68087599. The next prime is 68087629. The reversal of 68087617 is 71678086.

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 11296321 + 56791296 = 3361^2 + 7536^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68087617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68084617) 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, 2618742 + ... + 2618767.

It is an arithmetic number, because the mean of its divisors is an integer number (18331285).

Almost surely, 2^68087617 is an apocalyptic number.

It is an amenable number.

68087617 is a deficient number, since it is larger than the sum of its proper divisors (5237523).

68087617 is a wasteful number, since it uses less digits than its factorization.

68087617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5237522.

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 68087617 is about 8251.5221020125. The cubic root of 68087617 is about 408.3407400387.

The spelling of 68087617 in words is "sixty-eight million, eighty-seven thousand, six hundred seventeen".