68427521 has 2 divisors, whose sum is σ = 68427522. Its totient is φ = 68427520.

The previous prime is 68427497. The next prime is 68427523. The reversal of 68427521 is 12572486.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36663025 + 31764496 = 6055^2 + 5636^2 .

It is a cyclic number.

It is not a de Polignac number, because 68427521 - 2¹⁴ = 68411137 is a prime.

Together with 68427523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68427523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34213760 + 34213761.

It is an arithmetic number, because the mean of its divisors is an integer number (34213761).

Almost surely, 2^68427521 is an apocalyptic number.

It is an amenable number.

68427521 is a deficient number, since it is larger than the sum of its proper divisors (1).

68427521 is an equidigital number, since it uses as much as digits as its factorization.

68427521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 35.

The square root of 68427521 is about 8272.0929032501. The cubic root of 68427521 is about 409.0191126543.

The spelling of 68427521 in words is "sixty-eight million, four hundred twenty-seven thousand, five hundred twenty-one".