98139 has 4 divisors (see below), whose sum is σ = 130856. Its totient is φ = 65424.

The previous prime is 98129. The next prime is 98143. The reversal of 98139 is 93189.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93189 = 3 ⋅31063.

It is not a de Polignac number, because 98139 - 2⁴ = 98123 is a prime.

It is a D-number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 98139.

It is not an unprimeable number, because it can be changed into a prime (98129) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 16354 + ... + 16359.

It is an arithmetic number, because the mean of its divisors is an integer number (32714).

2⁹⁸¹³⁹ is an apocalyptic number.

98139 is a deficient number, since it is larger than the sum of its proper divisors (32717).

98139 is a wasteful number, since it uses less digits than its factorization.

98139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32716.

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

The square root of 98139 is about 313.2714477893. The cubic root of 98139 is about 46.1261502640.

Subtracting from 98139 its reverse (93189), we obtain a triangular number (4950 = T₉₉).

The spelling of 98139 in words is "ninety-eight thousand, one hundred thirty-nine".