68105911 has 4 divisors (see below), whose sum is σ = 68253472. Its totient is φ = 67958352.

The previous prime is 68105903. The next prime is 68105953. The reversal of 68105911 is 11950186.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68105911 - 2³ = 68105903 is a prime.

It is a super-2 number, since 2×68105911² = 9276830226279842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68105971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73086 + ... + 74011.

It is an arithmetic number, because the mean of its divisors is an integer number (17063368).

Almost surely, 2^68105911 is an apocalyptic number.

68105911 is a deficient number, since it is larger than the sum of its proper divisors (147561).

68105911 is a wasteful number, since it uses less digits than its factorization.

68105911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147560.

The product of its (nonzero) digits is 2160, while the sum is 31.

The square root of 68105911 is about 8252.6305503155. The cubic root of 68105911 is about 408.3773081984.

It can be divided in two parts, 6810 and 5911, that added together give a palindrome (12721).

The spelling of 68105911 in words is "sixty-eight million, one hundred five thousand, nine hundred eleven".