68507217 has 24 divisors (see below), whose sum is σ = 106142400. Its totient is φ = 42445728.

The previous prime is 68507207. The next prime is 68507221. The reversal of 68507217 is 71270586.

It is not a de Polignac number, because 68507217 - 2¹⁵ = 68474449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68507207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5284 + ... + 12842.

It is an arithmetic number, because the mean of its divisors is an integer number (4422600).

Almost surely, 2^68507217 is an apocalyptic number.

It is an amenable number.

68507217 is a deficient number, since it is larger than the sum of its proper divisors (37635183).

68507217 is a wasteful number, since it uses less digits than its factorization.

68507217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7637 (or 7634 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 68507217 is about 8276.9086620549. The cubic root of 68507217 is about 409.1778428447.

The spelling of 68507217 in words is "sixty-eight million, five hundred seven thousand, two hundred seventeen".