381867 has 4 divisors (see below), whose sum is σ = 509160. Its totient is φ = 254576.

The previous prime is 381859. The next prime is 381911. The reversal of 381867 is 768183.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 381867 - 2³ = 381859 is a prime.

It is a D-number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 381867.

It is not an unprimeable number, because it can be changed into a prime (381817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63642 + ... + 63647.

It is an arithmetic number, because the mean of its divisors is an integer number (127290).

2³⁸¹⁸⁶⁷ is an apocalyptic number.

381867 is a deficient number, since it is larger than the sum of its proper divisors (127293).

381867 is a wasteful number, since it uses less digits than its factorization.

381867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127292.

The product of its digits is 8064, while the sum is 33.

The square root of 381867 is about 617.9538817744. The cubic root of 381867 is about 72.5499932634.

The spelling of 381867 in words is "three hundred eighty-one thousand, eight hundred sixty-seven".