381718839241 has 2 divisors, whose sum is σ = 381718839242. Its totient is φ = 381718839240.

The previous prime is 381718839223. The next prime is 381718839247. The reversal of 381718839241 is 142938817183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 376462009225 + 5256830016 = 613565^2 + 72504^2 .

It is an emirp because it is prime and its reverse (142938817183) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381718839241 is a prime.

It is not a weakly prime, because it can be changed into another prime (381718839247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190859419620 + 190859419621.

It is an arithmetic number, because the mean of its divisors is an integer number (190859419621).

Almost surely, 2^381718839241 is an apocalyptic number.

It is an amenable number.

381718839241 is a deficient number, since it is larger than the sum of its proper divisors (1).

381718839241 is an equidigital number, since it uses as much as digits as its factorization.

381718839241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2322432, while the sum is 55.

The spelling of 381718839241 in words is "three hundred eighty-one billion, seven hundred eighteen million, eight hundred thirty-nine thousand, two hundred forty-one".