68391097 has 2 divisors, whose sum is σ = 68391098. Its totient is φ = 68391096.

The previous prime is 68391049. The next prime is 68391101. The reversal of 68391097 is 79019386.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41100921 + 27290176 = 6411^2 + 5224^2 .

It is a cyclic number.

It is not a de Polignac number, because 68391097 - 2¹⁹ = 67866809 is a prime.

It is not a weakly prime, because it can be changed into another prime (68391047) 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, 34195548 + 34195549.

It is an arithmetic number, because the mean of its divisors is an integer number (34195549).

Almost surely, 2^68391097 is an apocalyptic number.

It is an amenable number.

68391097 is a deficient number, since it is larger than the sum of its proper divisors (1).

68391097 is an equidigital number, since it uses as much as digits as its factorization.

68391097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 68391097 is about 8269.8909908172. The cubic root of 68391097 is about 408.9465260880.

The spelling of 68391097 in words is "sixty-eight million, three hundred ninety-one thousand, ninety-seven".