387715 has 4 divisors (see below), whose sum is σ = 465264. Its totient is φ = 310168.

The previous prime is 387707. The next prime is 387721. The reversal of 387715 is 517783.

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 387715 - 2³ = 387707 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38767 + ... + 38776.

It is an arithmetic number, because the mean of its divisors is an integer number (116316).

2³⁸⁷⁷¹⁵ is an apocalyptic number.

387715 is a deficient number, since it is larger than the sum of its proper divisors (77549).

387715 is an equidigital number, since it uses as much as digits as its factorization.

387715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77548.

The product of its digits is 5880, while the sum is 31.

The square root of 387715 is about 622.6676481077. The cubic root of 387715 is about 72.9184678013.

The spelling of 387715 in words is "three hundred eighty-seven thousand, seven hundred fifteen".