68888201309 has 2 divisors, whose sum is σ = 68888201310. Its totient is φ = 68888201308.

The previous prime is 68888201287. The next prime is 68888201321. The reversal of 68888201309 is 90310288886.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58927562500 + 9960638809 = 242750^2 + 99803^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68888201309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68888201399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34444100654 + 34444100655.

It is an arithmetic number, because the mean of its divisors is an integer number (34444100655).

Almost surely, 2^68888201309 is an apocalyptic number.

It is an amenable number.

68888201309 is a deficient number, since it is larger than the sum of its proper divisors (1).

68888201309 is an equidigital number, since it uses as much as digits as its factorization.

68888201309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1327104, while the sum is 53.

The spelling of 68888201309 in words is "sixty-eight billion, eight hundred eighty-eight million, two hundred one thousand, three hundred nine".