68109279 has 24 divisors (see below), whose sum is σ = 108511872. Its totient is φ = 37221360.

The previous prime is 68109271. The next prime is 68109289. The reversal of 68109279 is 97290186.

It is not a de Polignac number, because 68109279 - 2³ = 68109271 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68109279.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68109271) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8044 + ... + 14174.

It is an arithmetic number, because the mean of its divisors is an integer number (4521328).

Almost surely, 2^68109279 is an apocalyptic number.

68109279 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

68109279 is a deficient number, since it is larger than the sum of its proper divisors (40402593).

68109279 is a wasteful number, since it uses less digits than its factorization.

68109279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6187 (or 6164 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 68109279 is about 8252.8346039406. The cubic root of 68109279 is about 408.3840398320.

The spelling of 68109279 in words is "sixty-eight million, one hundred nine thousand, two hundred seventy-nine".