68759109 has 18 divisors (see below), whose sum is σ = 100620390. Its totient is φ = 45246288.

The previous prime is 68759099. The next prime is 68759111. The reversal of 68759109 is 90195786.

It can be written as a sum of positive squares in only one way, i.e., 38750625 + 30008484 = 6225^2 + 5478^2 .

It is not a de Polignac number, because 68759109 - 2¹² = 68755013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68752109) 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 17 ways as a sum of consecutive naturals, for example, 61447 + ... + 62555.

Almost surely, 2^68759109 is an apocalyptic number.

It is an amenable number.

68759109 is a deficient number, since it is larger than the sum of its proper divisors (31861281).

68759109 is a wasteful number, since it uses less digits than its factorization.

68759109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281 (or 1195 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 68759109 is about 8292.1112510627. Note that the first 3 decimals coincide. The cubic root of 68759109 is about 409.6787271012.

The spelling of 68759109 in words is "sixty-eight million, seven hundred fifty-nine thousand, one hundred nine".