68459009 has 2 divisors, whose sum is σ = 68459010. Its totient is φ = 68459008.

The previous prime is 68458979. The next prime is 68459081. The reversal of 68459009 is 90095486.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63552784 + 4906225 = 7972^2 + 2215^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68459009 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68459089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34229504 + 34229505.

It is an arithmetic number, because the mean of its divisors is an integer number (34229505).

Almost surely, 2^68459009 is an apocalyptic number.

It is an amenable number.

68459009 is a deficient number, since it is larger than the sum of its proper divisors (1).

68459009 is an equidigital number, since it uses as much as digits as its factorization.

68459009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 68459009 is about 8273.9959511714. The cubic root of 68459009 is about 409.0818418926.

The spelling of 68459009 in words is "sixty-eight million, four hundred fifty-nine thousand, nine".