68560921 has 24 divisors (see below), whose sum is σ = 83083392. Its totient is φ = 55752000.

The previous prime is 68560913. The next prime is 68560927. The reversal of 68560921 is 12906586.

It is not a de Polignac number, because 68560921 - 2³ = 68560913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68560927) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 678771 + ... + 678871.

It is an arithmetic number, because the mean of its divisors is an integer number (3461808).

Almost surely, 2^68560921 is an apocalyptic number.

It is an amenable number.

68560921 is a deficient number, since it is larger than the sum of its proper divisors (14522471).

68560921 is a wasteful number, since it uses less digits than its factorization.

68560921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273 (or 172 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 68560921 is about 8280.1522329001. The cubic root of 68560921 is about 409.2847354626.

The spelling of 68560921 in words is "sixty-eight million, five hundred sixty thousand, nine hundred twenty-one".