68118397 has 2 divisors, whose sum is σ = 68118398. Its totient is φ = 68118396.

The previous prime is 68118359. The next prime is 68118403. The reversal of 68118397 is 79381186.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67716441 + 401956 = 8229^2 + 634^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68118397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68118307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34059198 + 34059199.

It is an arithmetic number, because the mean of its divisors is an integer number (34059199).

Almost surely, 2^68118397 is an apocalyptic number.

It is an amenable number.

68118397 is a deficient number, since it is larger than the sum of its proper divisors (1).

68118397 is an equidigital number, since it uses as much as digits as its factorization.

68118397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 43.

The square root of 68118397 is about 8253.3870017103. The cubic root of 68118397 is about 408.4022628973.

The spelling of 68118397 in words is "sixty-eight million, one hundred eighteen thousand, three hundred ninety-seven".