387663 has 4 divisors (see below), whose sum is σ = 516888. Its totient is φ = 258440.

The previous prime is 387659. The next prime is 387677. The reversal of 387663 is 366783.

It is a happy number.

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 387663 - 2² = 387659 is a prime.

It is a D-number.

387663 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387613) 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, 64608 + ... + 64613.

It is an arithmetic number, because the mean of its divisors is an integer number (129222).

2³⁸⁷⁶⁶³ is an apocalyptic number.

387663 is a deficient number, since it is larger than the sum of its proper divisors (129225).

387663 is a wasteful number, since it uses less digits than its factorization.

387663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129224.

The product of its digits is 18144, while the sum is 33.

The square root of 387663 is about 622.6258908847. The cubic root of 387663 is about 72.9152077350.

The spelling of 387663 in words is "three hundred eighty-seven thousand, six hundred sixty-three".