68005779 has 16 divisors (see below), whose sum is σ = 95116032. Its totient is φ = 43137248.

The previous prime is 68005771. The next prime is 68005787. The reversal of 68005779 is 97750086.

It is an interprime number because it is at equal distance from previous prime (68005771) and next prime (68005787).

It is a cyclic number.

It is not a de Polignac number, because 68005779 - 2³ = 68005771 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68005779.

It is not an unprimeable number, because it can be changed into a prime (68005771) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11092 + ... + 16094.

It is an arithmetic number, because the mean of its divisors is an integer number (5944752).

Almost surely, 2^68005779 is an apocalyptic number.

68005779 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

68005779 is a deficient number, since it is larger than the sum of its proper divisors (27110253).

68005779 is a wasteful number, since it uses less digits than its factorization.

68005779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5226.

The product of its (nonzero) digits is 105840, while the sum is 42.

The square root of 68005779 is about 8246.5616471351. The cubic root of 68005779 is about 408.1770725528.

The spelling of 68005779 in words is "sixty-eight million, five thousand, seven hundred seventy-nine".