387943 has 4 divisors (see below), whose sum is σ = 389880. Its totient is φ = 386008.

The previous prime is 387917. The next prime is 387953. The reversal of 387943 is 349783.

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 387943 - 2⁵ = 387911 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 387899 and 387908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387913) 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, 628 + ... + 1081.

It is an arithmetic number, because the mean of its divisors is an integer number (97470).

2³⁸⁷⁹⁴³ is an apocalyptic number.

387943 is a deficient number, since it is larger than the sum of its proper divisors (1937).

387943 is a wasteful number, since it uses less digits than its factorization.

387943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1936.

The product of its digits is 18144, while the sum is 34.

The square root of 387943 is about 622.8507044228. The cubic root of 387943 is about 72.9327584984.

The spelling of 387943 in words is "three hundred eighty-seven thousand, nine hundred forty-three".