387647 has 4 divisors (see below), whose sum is σ = 417480. Its totient is φ = 357816.

The previous prime is 387641. The next prime is 387659. The reversal of 387647 is 746783.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 746783 = 47 ⋅15889.

It is a cyclic number.

It is not a de Polignac number, because 387647 - 2⁴ = 387631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387641) 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, 14897 + ... + 14922.

It is an arithmetic number, because the mean of its divisors is an integer number (104370).

2³⁸⁷⁶⁴⁷ is an apocalyptic number.

387647 is a deficient number, since it is larger than the sum of its proper divisors (29833).

387647 is a wasteful number, since it uses less digits than its factorization.

387647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29832.

The product of its digits is 28224, while the sum is 35.

The square root of 387647 is about 622.6130419450. The cubic root of 387647 is about 72.9142045790.

The spelling of 387647 in words is "three hundred eighty-seven thousand, six hundred forty-seven".