381679 has 4 divisors (see below), whose sum is σ = 385560. Its totient is φ = 377800.

The previous prime is 381673. The next prime is 381697. The reversal of 381679 is 976183.

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 381679 - 2⁹ = 381167 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1789 + ... + 1990.

It is an arithmetic number, because the mean of its divisors is an integer number (96390).

2³⁸¹⁶⁷⁹ is an apocalyptic number.

381679 is a deficient number, since it is larger than the sum of its proper divisors (3881).

381679 is a wasteful number, since it uses less digits than its factorization.

381679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3880.

The product of its digits is 9072, while the sum is 34.

The square root of 381679 is about 617.8017481361. The cubic root of 381679 is about 72.5380854197.

The spelling of 381679 in words is "three hundred eighty-one thousand, six hundred seventy-nine".