68388997 has 2 divisors, whose sum is σ = 68388998. Its totient is φ = 68388996.

The previous prime is 68388979. The next prime is 68389001. The reversal of 68388997 is 79988386.

Together with previous prime (68388979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65270241 + 3118756 = 8079^2 + 1766^2 .

It is a cyclic number.

It is not a de Polignac number, because 68388997 - 2²³ = 60000389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68388907) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34194498 + 34194499.

It is an arithmetic number, because the mean of its divisors is an integer number (34194499).

Almost surely, 2^68388997 is an apocalyptic number.

It is an amenable number.

68388997 is a deficient number, since it is larger than the sum of its proper divisors (1).

68388997 is an equidigital number, since it uses as much as digits as its factorization.

68388997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5225472, while the sum is 58.

The square root of 68388997 is about 8269.7640232355. The cubic root of 68388997 is about 408.9423403751.

The spelling of 68388997 in words is "sixty-eight million, three hundred eighty-eight thousand, nine hundred ninety-seven".