387843 has 4 divisors (see below), whose sum is σ = 517128. Its totient is φ = 258560.

The previous prime is 387839. The next prime is 387853. The reversal of 387843 is 348783.

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 387843 - 2² = 387839 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (387853) 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, 64638 + ... + 64643.

It is an arithmetic number, because the mean of its divisors is an integer number (129282).

2³⁸⁷⁸⁴³ is an apocalyptic number.

387843 is a deficient number, since it is larger than the sum of its proper divisors (129285).

387843 is a wasteful number, since it uses less digits than its factorization.

387843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129284.

The product of its digits is 16128, while the sum is 33.

The square root of 387843 is about 622.7704231898. The cubic root of 387843 is about 72.9264913383.

Subtracting from 387843 its reverse (348783), we obtain a triangular number (39060 = T₂₇₉).

The spelling of 387843 in words is "three hundred eighty-seven thousand, eight hundred forty-three".