387491 has 8 divisors (see below), whose sum is σ = 428064. Its totient is φ = 348480.

The previous prime is 387463. The next prime is 387493. The reversal of 387491 is 194783.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-387491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (387493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170 + ... + 896.

It is an arithmetic number, because the mean of its divisors is an integer number (53508).

2³⁸⁷⁴⁹¹ is an apocalyptic number.

387491 is a deficient number, since it is larger than the sum of its proper divisors (40573).

387491 is a wasteful number, since it uses less digits than its factorization.

387491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781.

The product of its digits is 6048, while the sum is 32.

The square root of 387491 is about 622.4877508835. The cubic root of 387491 is about 72.9044223613.

It can be divided in two parts, 387 and 491, that added together give a palindrome (878).

The spelling of 387491 in words is "three hundred eighty-seven thousand, four hundred ninety-one".