387389 has 4 divisors (see below), whose sum is σ = 404256. Its totient is φ = 370524.

The previous prime is 387371. The next prime is 387397. The reversal of 387389 is 983783.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-387389 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387329) 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, 8399 + ... + 8444.

It is an arithmetic number, because the mean of its divisors is an integer number (101064).

2³⁸⁷³⁸⁹ is an apocalyptic number.

It is an amenable number.

387389 is a deficient number, since it is larger than the sum of its proper divisors (16867).

387389 is a wasteful number, since it uses less digits than its factorization.

387389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16866.

The product of its digits is 36288, while the sum is 38.

The square root of 387389 is about 622.4058161682. The cubic root of 387389 is about 72.8980248762.

The spelling of 387389 in words is "three hundred eighty-seven thousand, three hundred eighty-nine".