68522009 has 2 divisors, whose sum is σ = 68522010. Its totient is φ = 68522008.

The previous prime is 68521967. The next prime is 68522021. The reversal of 68522009 is 90022586.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47334400 + 21187609 = 6880^2 + 4603^2 .

It is a cyclic number.

It is not a de Polignac number, because 68522009 - 2¹² = 68517913 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68527009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34261004 + 34261005.

It is an arithmetic number, because the mean of its divisors is an integer number (34261005).

Almost surely, 2^68522009 is an apocalyptic number.

It is an amenable number.

68522009 is a deficient number, since it is larger than the sum of its proper divisors (1).

68522009 is an equidigital number, since it uses as much as digits as its factorization.

68522009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 68522009 is about 8277.8021841549. The cubic root of 68522009 is about 409.2072904628.

The spelling of 68522009 in words is "sixty-eight million, five hundred twenty-two thousand, nine".