391084 has 6 divisors (see below), whose sum is σ = 684404. Its totient is φ = 195540.

The previous prime is 391073. The next prime is 391103. The reversal of 391084 is 480193.

It is an unprimeable number.

391084 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 as a sum of consecutive naturals, namely, 48882 + ... + 48889.

2³⁹¹⁰⁸⁴ is an apocalyptic number.

It is an amenable number.

391084 is a deficient number, since it is larger than the sum of its proper divisors (293320).

391084 is a wasteful number, since it uses less digits than its factorization.

391084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97775 (or 97773 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 391084 is about 625.3670921947. The cubic root of 391084 is about 73.1290642298.

The spelling of 391084 in words is "three hundred ninety-one thousand, eighty-four".