68782705 has 4 divisors (see below), whose sum is σ = 82539252. Its totient is φ = 55026160.

The previous prime is 68782699. The next prime is 68782733. The reversal of 68782705 is 50728786.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50728786 = 2 ⋅25364393.

It can be written as a sum of positive squares in 2 ways, for example, as 17631601 + 51151104 = 4199^2 + 7152^2 .

It is not a de Polignac number, because 68782705 - 2⁹ = 68782193 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 6878266 + ... + 6878275.

It is an arithmetic number, because the mean of its divisors is an integer number (20634813).

Almost surely, 2^68782705 is an apocalyptic number.

It is an amenable number.

68782705 is a deficient number, since it is larger than the sum of its proper divisors (13756547).

68782705 is a wasteful number, since it uses less digits than its factorization.

68782705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13756546.

The product of its (nonzero) digits is 188160, while the sum is 43.

The square root of 68782705 is about 8293.5339271025. The cubic root of 68782705 is about 409.7255847652.

The spelling of 68782705 in words is "sixty-eight million, seven hundred eighty-two thousand, seven hundred five".