68782313 has 8 divisors (see below), whose sum is σ = 69632136. Its totient is φ = 67936000.

The previous prime is 68782303. The next prime is 68782321. The reversal of 68782313 is 31328786.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4012009 + 64770304 = 2003^2 + 8048^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68782313 - 2⁶ = 68782249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68782303) 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 7 ways as a sum of consecutive naturals, for example, 77633 + ... + 78513.

It is an arithmetic number, because the mean of its divisors is an integer number (8704017).

Almost surely, 2^68782313 is an apocalyptic number.

It is an amenable number.

68782313 is a deficient number, since it is larger than the sum of its proper divisors (849823).

68782313 is a wasteful number, since it uses less digits than its factorization.

68782313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1755.

The product of its digits is 48384, while the sum is 38.

The square root of 68782313 is about 8293.5102941999. The cubic root of 68782313 is about 409.7248064071.

The spelling of 68782313 in words is "sixty-eight million, seven hundred eighty-two thousand, three hundred thirteen".