387091 has 4 divisors (see below), whose sum is σ = 388800. Its totient is φ = 385384.

The previous prime is 387089. The next prime is 387109. The reversal of 387091 is 190783.

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 387091 - 2¹ = 387089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (387031) 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, 451 + ... + 988.

It is an arithmetic number, because the mean of its divisors is an integer number (97200).

2³⁸⁷⁰⁹¹ is an apocalyptic number.

387091 is a deficient number, since it is larger than the sum of its proper divisors (1709).

387091 is a wasteful number, since it uses less digits than its factorization.

387091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1708.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 387091 is about 622.1663764621. The cubic root of 387091 is about 72.8793277491.

The spelling of 387091 in words is "three hundred eighty-seven thousand, ninety-one".