68509775 has 12 divisors (see below), whose sum is σ = 85290672. Its totient is φ = 54589440.

The previous prime is 68509759. The next prime is 68509787. The reversal of 68509775 is 57790586.

It is a happy number.

It is not a de Polignac number, because 68509775 - 2⁴ = 68509759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1094 + ... + 11756.

It is an arithmetic number, because the mean of its divisors is an integer number (7107556).

Almost surely, 2^68509775 is an apocalyptic number.

68509775 is a deficient number, since it is larger than the sum of its proper divisors (16780897).

68509775 is a wasteful number, since it uses less digits than its factorization.

68509775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10930 (or 10925 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 47.

The square root of 68509775 is about 8277.0631869039. The cubic root of 68509775 is about 409.1829355631.

The spelling of 68509775 in words is "sixty-eight million, five hundred nine thousand, seven hundred seventy-five".