68568521 has 8 divisors (see below), whose sum is σ = 79083840. Its totient is φ = 58233168.

The previous prime is 68568517. The next prime is 68568527. The reversal of 68568521 is 12586586.

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

It is not a de Polignac number, because 68568521 - 2² = 68568517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68568527) 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, 44171 + ... + 45696.

It is an arithmetic number, because the mean of its divisors is an integer number (9885480).

Almost surely, 2^68568521 is an apocalyptic number.

It is an amenable number.

68568521 is a deficient number, since it is larger than the sum of its proper divisors (10515319).

68568521 is a wasteful number, since it uses less digits than its factorization.

68568521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89983.

The product of its digits is 115200, while the sum is 41.

The square root of 68568521 is about 8280.6111489431. The cubic root of 68568521 is about 409.2998580184.

The spelling of 68568521 in words is "sixty-eight million, five hundred sixty-eight thousand, five hundred twenty-one".