381816713 has 2 divisors, whose sum is σ = 381816714. Its totient is φ = 381816712.

The previous prime is 381816707. The next prime is 381816749. The reversal of 381816713 is 317618183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 366071689 + 15745024 = 19133^2 + 3968^2 .

It is a cyclic number.

It is not a de Polignac number, because 381816713 - 2⁶ = 381816649 is a prime.

It is a super-2 number, since 2×381816713² = 291568004652248738, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (381816703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190908356 + 190908357.

It is an arithmetic number, because the mean of its divisors is an integer number (190908357).

Almost surely, 2^381816713 is an apocalyptic number.

It is an amenable number.

381816713 is a deficient number, since it is larger than the sum of its proper divisors (1).

381816713 is an equidigital number, since it uses as much as digits as its factorization.

381816713 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 38.

The square root of 381816713 is about 19540.1308337483. The cubic root of 381816713 is about 725.4680848814.

The spelling of 381816713 in words is "three hundred eighty-one million, eight hundred sixteen thousand, seven hundred thirteen".