381991833347 has 2 divisors, whose sum is σ = 381991833348. Its totient is φ = 381991833346.

The previous prime is 381991833343. The next prime is 381991833373. The reversal of 381991833347 is 743338199183.

It is a weak prime.

It is an emirp because it is prime and its reverse (743338199183) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 381991833347 - 2² = 381991833343 is a prime.

It is not a weakly prime, because it can be changed into another prime (381991833343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190995916673 + 190995916674.

It is an arithmetic number, because the mean of its divisors is an integer number (190995916674).

Almost surely, 2^381991833347 is an apocalyptic number.

381991833347 is a deficient number, since it is larger than the sum of its proper divisors (1).

381991833347 is an equidigital number, since it uses as much as digits as its factorization.

381991833347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11757312, while the sum is 59.

The spelling of 381991833347 in words is "three hundred eighty-one billion, nine hundred ninety-one million, eight hundred thirty-three thousand, three hundred forty-seven".