68009985 has 24 divisors (see below), whose sum is σ = 118198080. Its totient is φ = 36175392.

The previous prime is 68009983. The next prime is 68009993. The reversal of 68009985 is 58990086.

It is not a de Polignac number, because 68009985 - 2¹ = 68009983 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 68009985.

It is not an unprimeable number, because it can be changed into a prime (68009983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17052 + ... + 20658.

It is an arithmetic number, because the mean of its divisors is an integer number (4924920).

It is a Proth number, since it is equal to 4151 ⋅ 2¹⁴ + 1 and 4151 < 2¹⁴.

Almost surely, 2^68009985 is an apocalyptic number.

It is an amenable number.

68009985 is a deficient number, since it is larger than the sum of its proper divisors (50188095).

68009985 is a wasteful number, since it uses less digits than its factorization.

68009985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4037 (or 4034 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The square root of 68009985 is about 8246.8166585659. The cubic root of 68009985 is about 408.1854873150.

The spelling of 68009985 in words is "sixty-eight million, nine thousand, nine hundred eighty-five".