98391 has 4 divisors (see below), whose sum is σ = 131192. Its totient is φ = 65592.

The previous prime is 98389. The next prime is 98407. The reversal of 98391 is 19389.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 98391 - 2¹ = 98389 is a prime.

It is a D-number.

It is a Duffinian number.

98391 is a lucky number.

It is a plaindrome in base 14.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 98391.

It is not an unprimeable number, because it can be changed into a prime (98321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16396 + ... + 16401.

It is an arithmetic number, because the mean of its divisors is an integer number (32798).

2⁹⁸³⁹¹ is an apocalyptic number.

98391 is a deficient number, since it is larger than the sum of its proper divisors (32801).

98391 is a wasteful number, since it uses less digits than its factorization.

98391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32800.

The product of its digits is 1944, while the sum is 30.

The square root of 98391 is about 313.6733970231. The cubic root of 98391 is about 46.1655972215.

The spelling of 98391 in words is "ninety-eight thousand, three hundred ninety-one".