387709 has 8 divisors (see below), whose sum is σ = 448448. Its totient is φ = 328320.

The previous prime is 387707. The next prime is 387721. The reversal of 387709 is 907783.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 387709 - 2¹ = 387707 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387707) 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 7 ways as a sum of consecutive naturals, for example, 394 + ... + 964.

It is an arithmetic number, because the mean of its divisors is an integer number (56056).

2³⁸⁷⁷⁰⁹ is an apocalyptic number.

It is an amenable number.

387709 is a deficient number, since it is larger than the sum of its proper divisors (60739).

387709 is an equidigital number, since it uses as much as digits as its factorization.

387709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 387709 is about 622.6628301095. The cubic root of 387709 is about 72.9180916547.

The spelling of 387709 in words is "three hundred eighty-seven thousand, seven hundred nine".