38668717 has 2 divisors, whose sum is σ = 38668718. Its totient is φ = 38668716.

The previous prime is 38668673. The next prime is 38668723. The reversal of 38668717 is 71786683.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31427236 + 7241481 = 5606^2 + 2691^2 .

It is an emirp because it is prime and its reverse (71786683) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38668717 - 2¹¹ = 38666669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38668417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19334358 + 19334359.

It is an arithmetic number, because the mean of its divisors is an integer number (19334359).

Almost surely, 2^38668717 is an apocalyptic number.

It is an amenable number.

38668717 is a deficient number, since it is larger than the sum of its proper divisors (1).

38668717 is an equidigital number, since it uses as much as digits as its factorization.

38668717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 338688, while the sum is 46.

The square root of 38668717 is about 6218.4175639788. The cubic root of 38668717 is about 338.1581982977.

The spelling of 38668717 in words is "thirty-eight million, six hundred sixty-eight thousand, seven hundred seventeen".