68478805 has 8 divisors (see below), whose sum is σ = 87008472. Its totient is φ = 51560448.

The previous prime is 68478769. The next prime is 68478811. The reversal of 68478805 is 50887486.

It can be written as a sum of positive squares in 4 ways, for example, as 37051569 + 31427236 = 6087^2 + 5606^2 .

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 68478805 - 2²³ = 60090197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 402732 + ... + 402901.

It is an arithmetic number, because the mean of its divisors is an integer number (10876059).

Almost surely, 2^68478805 is an apocalyptic number.

It is an amenable number.

68478805 is a deficient number, since it is larger than the sum of its proper divisors (18529667).

68478805 is a wasteful number, since it uses less digits than its factorization.

68478805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805655.

The product of its (nonzero) digits is 430080, while the sum is 46.

The square root of 68478805 is about 8275.1921427844. The cubic root of 68478805 is about 409.1212689103.

The spelling of 68478805 in words is "sixty-eight million, four hundred seventy-eight thousand, eight hundred five".