381667 has 16 divisors (see below), whose sum is σ = 477792. Its totient is φ = 299520.

The previous prime is 381659. The next prime is 381673. The reversal of 381667 is 766183.

It is not a de Polignac number, because 381667 - 2³ = 381659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381607) 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 in 15 ways as a sum of consecutive naturals, for example, 2353 + ... + 2509.

It is an arithmetic number, because the mean of its divisors is an integer number (29862).

2³⁸¹⁶⁶⁷ is an apocalyptic number.

381667 is a deficient number, since it is larger than the sum of its proper divisors (96125).

381667 is a wasteful number, since it uses less digits than its factorization.

381667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198.

The product of its digits is 6048, while the sum is 31.

The square root of 381667 is about 617.7920362064. The cubic root of 381667 is about 72.5373252118.

It can be divided in two parts, 3816 and 67, that added together give a palindrome (3883).

The spelling of 381667 in words is "three hundred eighty-one thousand, six hundred sixty-seven".