68512647 has 8 divisors (see below), whose sum is σ = 104400256. Its totient is φ = 39150072.

The previous prime is 68512603. The next prime is 68512687. The reversal of 68512647 is 74621586.

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

It is not a de Polignac number, because 68512647 - 2¹⁶ = 68447111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68512687) by changing a digit.

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, 1631233 + ... + 1631274.

It is an arithmetic number, because the mean of its divisors is an integer number (13050032).

Almost surely, 2^68512647 is an apocalyptic number.

68512647 is a deficient number, since it is larger than the sum of its proper divisors (35887609).

68512647 is a wasteful number, since it uses less digits than its factorization.

68512647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3262517.

The product of its digits is 80640, while the sum is 39.

The square root of 68512647 is about 8277.2366765727. The cubic root of 68512647 is about 409.1886532726.

The spelling of 68512647 in words is "sixty-eight million, five hundred twelve thousand, six hundred forty-seven".