381899 has 8 divisors (see below), whose sum is σ = 442080. Its totient is φ = 323136.

The previous prime is 381859. The next prime is 381911. The reversal of 381899 is 998183.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 381899 - 2¹⁶ = 316363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381859) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 317 + ... + 929.

It is an arithmetic number, because the mean of its divisors is an integer number (55260).

2³⁸¹⁸⁹⁹ is an apocalyptic number.

381899 is a deficient number, since it is larger than the sum of its proper divisors (60181).

381899 is an equidigital number, since it uses as much as digits as its factorization.

381899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709.

The product of its digits is 15552, while the sum is 38.

The square root of 381899 is about 617.9797731318. The cubic root of 381899 is about 72.5520197411.

The spelling of 381899 in words is "three hundred eighty-one thousand, eight hundred ninety-nine".