387687 has 4 divisors (see below), whose sum is σ = 516920. Its totient is φ = 258456.

The previous prime is 387683. The next prime is 387707. The reversal of 387687 is 786783.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 786783 = 3 ⋅262261.

It is not a de Polignac number, because 387687 - 2² = 387683 is a prime.

It is a D-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 (387683) 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, 64612 + ... + 64617.

It is an arithmetic number, because the mean of its divisors is an integer number (129230).

2³⁸⁷⁶⁸⁷ is an apocalyptic number.

387687 is a deficient number, since it is larger than the sum of its proper divisors (129233).

387687 is a wasteful number, since it uses less digits than its factorization.

387687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129232.

The product of its digits is 56448, while the sum is 39.

The square root of 387687 is about 622.6451637972. The cubic root of 387687 is about 72.9167124172.

The spelling of 387687 in words is "three hundred eighty-seven thousand, six hundred eighty-seven".