381859 has 2 divisors, whose sum is σ = 381860. Its totient is φ = 381858.

The previous prime is 381853. The next prime is 381911. The reversal of 381859 is 958183.

It is a weak prime.

It is an emirp because it is prime and its reverse (958183) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 381859 - 2⁹ = 381347 is a prime.

It is not a weakly prime, because it can be changed into another prime (381853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190929 + 190930.

It is an arithmetic number, because the mean of its divisors is an integer number (190930).

2³⁸¹⁸⁵⁹ is an apocalyptic number.

381859 is a deficient number, since it is larger than the sum of its proper divisors (1).

381859 is an equidigital number, since it uses as much as digits as its factorization.

381859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 34.

The square root of 381859 is about 617.9474087655. The cubic root of 381859 is about 72.5494866262.

The spelling of 381859 in words is "three hundred eighty-one thousand, eight hundred fifty-nine".