68387173 has 2 divisors, whose sum is σ = 68387174. Its totient is φ = 68387172.

The previous prime is 68387093. The next prime is 68387177. The reversal of 68387173 is 37178386.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65820769 + 2566404 = 8113^2 + 1602^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68387173 is a prime.

It is a plaindrome in base 13.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68387177) 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, 34193586 + 34193587.

It is an arithmetic number, because the mean of its divisors is an integer number (34193587).

Almost surely, 2^68387173 is an apocalyptic number.

It is an amenable number.

68387173 is a deficient number, since it is larger than the sum of its proper divisors (1).

68387173 is an equidigital number, since it uses as much as digits as its factorization.

68387173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 43.

The square root of 68387173 is about 8269.6537412397. The cubic root of 68387173 is about 408.9387047149.

The spelling of 68387173 in words is "sixty-eight million, three hundred eighty-seven thousand, one hundred seventy-three".