381133717 has 2 divisors, whose sum is σ = 381133718. Its totient is φ = 381133716.

The previous prime is 381133699. The next prime is 381133757. The reversal of 381133717 is 717331183.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 353665636 + 27468081 = 18806^2 + 5241^2 .

It is a cyclic number.

It is not a de Polignac number, because 381133717 - 2¹¹ = 381131669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381133757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190566858 + 190566859.

It is an arithmetic number, because the mean of its divisors is an integer number (190566859).

Almost surely, 2^381133717 is an apocalyptic number.

It is an amenable number.

381133717 is a deficient number, since it is larger than the sum of its proper divisors (1).

381133717 is an equidigital number, since it uses as much as digits as its factorization.

381133717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10584, while the sum is 34.

The square root of 381133717 is about 19522.6462601769. The cubic root of 381133717 is about 725.0352528241.

The spelling of 381133717 in words is "three hundred eighty-one million, one hundred thirty-three thousand, seven hundred seventeen".