381191695581293 has 2 divisors, whose sum is σ = 381191695581294. Its totient is φ = 381191695581292.

The previous prime is 381191695581271. The next prime is 381191695581343. The reversal of 381191695581293 is 392185596191183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 233858782323364 + 147332913257929 = 15292442^2 + 12138077^2 .

It is a cyclic number.

It is not a de Polignac number, because 381191695581293 - 2¹² = 381191695577197 is a prime.

It is a super-2 number, since 2×381191695581293² (a number of 30 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381191695581223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190595847790646 + 190595847790647.

It is an arithmetic number, because the mean of its divisors is an integer number (190595847790647).

Almost surely, 2^{381191695581293} is an apocalyptic number.

It is an amenable number.

381191695581293 is a deficient number, since it is larger than the sum of its proper divisors (1).

381191695581293 is an equidigital number, since it uses as much as digits as its factorization.

381191695581293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 125971200, while the sum is 71.

The spelling of 381191695581293 in words is "three hundred eighty-one trillion, one hundred ninety-one billion, six hundred ninety-five million, five hundred eighty-one thousand, two hundred ninety-three".