381733447 has 2 divisors, whose sum is σ = 381733448. Its totient is φ = 381733446.

The previous prime is 381733421. The next prime is 381733459. The reversal of 381733447 is 744337183.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 381733447 - 2¹⁹ = 381209159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381739447) 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, 190866723 + 190866724.

It is an arithmetic number, because the mean of its divisors is an integer number (190866724).

Almost surely, 2^381733447 is an apocalyptic number.

381733447 is a deficient number, since it is larger than the sum of its proper divisors (1).

381733447 is an equidigital number, since it uses as much as digits as its factorization.

381733447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 40.

The square root of 381733447 is about 19538.0000767735. Note that the first 4 decimals coincide. The cubic root of 381733447 is about 725.4153447270.

The spelling of 381733447 in words is "three hundred eighty-one million, seven hundred thirty-three thousand, four hundred forty-seven".