68348209 has 2 divisors, whose sum is σ = 68348210. Its totient is φ = 68348208.

The previous prime is 68348191. The next prime is 68348239. The reversal of 68348209 is 90284386.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65658609 + 2689600 = 8103^2 + 1640^2 .

It is a cyclic number.

It is not a de Polignac number, because 68348209 - 2⁷ = 68348081 is a prime.

It is not a weakly prime, because it can be changed into another prime (68348239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34174104 + 34174105.

It is an arithmetic number, because the mean of its divisors is an integer number (34174105).

Almost surely, 2^68348209 is an apocalyptic number.

It is an amenable number.

68348209 is a deficient number, since it is larger than the sum of its proper divisors (1).

68348209 is an equidigital number, since it uses as much as digits as its factorization.

68348209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 68348209 is about 8267.2975632912. The cubic root of 68348209 is about 408.8610248709.

The spelling of 68348209 in words is "sixty-eight million, three hundred forty-eight thousand, two hundred nine".