68560421 has 2 divisors, whose sum is σ = 68560422. Its totient is φ = 68560420.

The previous prime is 68560411. The next prime is 68560477. The reversal of 68560421 is 12406586.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53436100 + 15124321 = 7310^2 + 3889^2 .

It is a cyclic number.

It is not a de Polignac number, because 68560421 - 2¹⁴ = 68544037 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68560411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34280210 + 34280211.

It is an arithmetic number, because the mean of its divisors is an integer number (34280211).

Almost surely, 2^68560421 is an apocalyptic number.

It is an amenable number.

68560421 is a deficient number, since it is larger than the sum of its proper divisors (1).

68560421 is an equidigital number, since it uses as much as digits as its factorization.

68560421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 68560421 is about 8280.1220401634. The cubic root of 68560421 is about 409.2837405185.

The spelling of 68560421 in words is "sixty-eight million, five hundred sixty thousand, four hundred twenty-one".