381515713 has 2 divisors, whose sum is σ = 381515714. Its totient is φ = 381515712.

The previous prime is 381515711. The next prime is 381515723. The reversal of 381515713 is 317515183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 277822224 + 103693489 = 16668^2 + 10183^2 .

It is an emirp because it is prime and its reverse (317515183) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 381515713 - 2¹ = 381515711 is a prime.

Together with 381515711, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (381515711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190757856 + 190757857.

It is an arithmetic number, because the mean of its divisors is an integer number (190757857).

Almost surely, 2^381515713 is an apocalyptic number.

It is an amenable number.

381515713 is a deficient number, since it is larger than the sum of its proper divisors (1).

381515713 is an equidigital number, since it uses as much as digits as its factorization.

381515713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12600, while the sum is 34.

The square root of 381515713 is about 19532.4272173225. The cubic root of 381515713 is about 725.2773971394.

The spelling of 381515713 in words is "three hundred eighty-one million, five hundred fifteen thousand, seven hundred thirteen".