982391 has 4 divisors (see below), whose sum is σ = 984984. Its totient is φ = 979800.

The previous prime is 982381. The next prime is 982393. The reversal of 982391 is 193289.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 193289 = 283 ⋅683.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-982391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (982393) 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, 605 + ... + 1526.

It is an arithmetic number, because the mean of its divisors is an integer number (246246).

2⁹⁸²³⁹¹ is an apocalyptic number.

982391 is a deficient number, since it is larger than the sum of its proper divisors (2593).

982391 is a wasteful number, since it uses less digits than its factorization.

982391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2592.

The product of its digits is 3888, while the sum is 32.

The square root of 982391 is about 991.1563953282. The cubic root of 982391 is about 99.4095539292.

The spelling of 982391 in words is "nine hundred eighty-two thousand, three hundred ninety-one".