68031305 has 16 divisors (see below), whose sum is σ = 86177280. Its totient is φ = 51414912.

The previous prime is 68031283. The next prime is 68031367. The reversal of 68031305 is 50313086.

It is a de Polignac number, because none of the positive numbers 2^k-68031305 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42632 + ... + 44198.

It is an arithmetic number, because the mean of its divisors is an integer number (5386080).

Almost surely, 2^68031305 is an apocalyptic number.

It is an amenable number.

68031305 is a deficient number, since it is larger than the sum of its proper divisors (18145975).

68031305 is a wasteful number, since it uses less digits than its factorization.

68031305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2048.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 68031305 is about 8248.1091772600. The cubic root of 68031305 is about 408.2281359809.

The spelling of 68031305 in words is "sixty-eight million, thirty-one thousand, three hundred five".