381648713 has 2 divisors, whose sum is σ = 381648714. Its totient is φ = 381648712.

The previous prime is 381648703. The next prime is 381648721. The reversal of 381648713 is 317846183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 344584969 + 37063744 = 18563^2 + 6088^2 .

It is a cyclic number.

It is not a de Polignac number, because 381648713 - 2²⁰ = 380600137 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (381648703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190824356 + 190824357.

It is an arithmetic number, because the mean of its divisors is an integer number (190824357).

Almost surely, 2^381648713 is an apocalyptic number.

It is an amenable number.

381648713 is a deficient number, since it is larger than the sum of its proper divisors (1).

381648713 is an equidigital number, since it uses as much as digits as its factorization.

381648713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 41.

The square root of 381648713 is about 19535.8315154487. The cubic root of 381648713 is about 725.3616668768.

The spelling of 381648713 in words is "three hundred eighty-one million, six hundred forty-eight thousand, seven hundred thirteen".