68300305 has 16 divisors (see below), whose sum is σ = 88424784. Its totient is φ = 50452480.

The previous prime is 68300303. The next prime is 68300321. The reversal of 68300305 is 50300386.

It can be written as a sum of positive squares in 8 ways, for example, as 3207681 + 65092624 = 1791^2 + 8068^2 .

It is not a de Polignac number, because 68300305 - 2¹ = 68300303 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68300305.

It is not an unprimeable number, because it can be changed into a prime (68300303) 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, 3076 + ... + 12085.

It is an arithmetic number, because the mean of its divisors is an integer number (5526549).

Almost surely, 2^68300305 is an apocalyptic number.

It is an amenable number.

68300305 is a deficient number, since it is larger than the sum of its proper divisors (20124479).

68300305 is a wasteful number, since it uses less digits than its factorization.

68300305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15236.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 68300305 is about 8264.3998572189. The cubic root of 68300305 is about 408.7654814936.

The spelling of 68300305 in words is "sixty-eight million, three hundred thousand, three hundred five".