68205647 has 8 divisors (see below), whose sum is σ = 70214256. Its totient is φ = 66223872.

The previous prime is 68205637. The next prime is 68205679. The reversal of 68205647 is 74650286.

It is a happy number.

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 68205647 - 2⁶ = 68205583 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68205647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68205607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1493 + ... + 11774.

It is an arithmetic number, because the mean of its divisors is an integer number (8776782).

Almost surely, 2^68205647 is an apocalyptic number.

68205647 is a deficient number, since it is larger than the sum of its proper divisors (2008609).

68205647 is a wasteful number, since it uses less digits than its factorization.

68205647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13417.

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 68205647 is about 8258.6710189957. The cubic root of 68205647 is about 408.5765569509.

The spelling of 68205647 in words is "sixty-eight million, two hundred five thousand, six hundred forty-seven".