381881743 has 2 divisors, whose sum is σ = 381881744. Its totient is φ = 381881742.

The previous prime is 381881713. The next prime is 381881783. The reversal of 381881743 is 347188183.

It is a weak prime.

It is an emirp because it is prime and its reverse (347188183) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 381881743 - 2⁹ = 381881231 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 381881743.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381881713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190940871 + 190940872.

It is an arithmetic number, because the mean of its divisors is an integer number (190940872).

Almost surely, 2^381881743 is an apocalyptic number.

381881743 is a deficient number, since it is larger than the sum of its proper divisors (1).

381881743 is an equidigital number, since it uses as much as digits as its factorization.

381881743 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129024, while the sum is 43.

The square root of 381881743 is about 19541.7947742780. The cubic root of 381881743 is about 725.5092691372.

The spelling of 381881743 in words is "three hundred eighty-one million, eight hundred eighty-one thousand, seven hundred forty-three".