68208305 has 12 divisors (see below), whose sum is σ = 89968116. Its totient is φ = 49605600.

The previous prime is 68208299. The next prime is 68208313. The reversal of 68208305 is 50380286.

It can be written as a sum of positive squares in 2 ways, for example, as 29170801 + 39037504 = 5401^2 + 6248^2 .

It is not a de Polignac number, because 68208305 - 2⁴ = 68208289 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55766 + ... + 56975.

It is an arithmetic number, because the mean of its divisors is an integer number (7497343).

Almost surely, 2^68208305 is an apocalyptic number.

It is an amenable number.

68208305 is a deficient number, since it is larger than the sum of its proper divisors (21759811).

68208305 is a wasteful number, since it uses less digits than its factorization.

68208305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112768 (or 112757 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 68208305 is about 8258.8319392030. The cubic root of 68208305 is about 408.5818643432.

The spelling of 68208305 in words is "sixty-eight million, two hundred eight thousand, three hundred five".