68305779 has 24 divisors (see below), whose sum is σ = 109970640. Its totient is φ = 40601088.

The previous prime is 68305777. The next prime is 68305793. The reversal of 68305779 is 97750386.

It is a happy number.

It is not a de Polignac number, because 68305779 - 2¹ = 68305777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68305771) 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 23 ways as a sum of consecutive naturals, for example, 8842 + ... + 14655.

It is an arithmetic number, because the mean of its divisors is an integer number (4582110).

Almost surely, 2^68305779 is an apocalyptic number.

68305779 is a deficient number, since it is larger than the sum of its proper divisors (41664861).

68305779 is a wasteful number, since it uses less digits than its factorization.

68305779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23539 (or 23536 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The square root of 68305779 is about 8264.7310301062. The cubic root of 68305779 is about 408.7764015155.

The spelling of 68305779 in words is "sixty-eight million, three hundred five thousand, seven hundred seventy-nine".