381887447047 has 2 divisors, whose sum is σ = 381887447048. Its totient is φ = 381887447046.

The previous prime is 381887447021. The next prime is 381887447059. The reversal of 381887447047 is 740744788183.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 381887447047 - 2¹⁹ = 381886922759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381887447087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190943723523 + 190943723524.

It is an arithmetic number, because the mean of its divisors is an integer number (190943723524).

Almost surely, 2^381887447047 is an apocalyptic number.

381887447047 is a deficient number, since it is larger than the sum of its proper divisors (1).

381887447047 is an equidigital number, since it uses as much as digits as its factorization.

381887447047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33718272, while the sum is 61.

The spelling of 381887447047 in words is "three hundred eighty-one billion, eight hundred eighty-seven million, four hundred forty-seven thousand, forty-seven".