98815 has 4 divisors (see below), whose sum is σ = 118584. Its totient is φ = 79048.

The previous prime is 98809. The next prime is 98837. The reversal of 98815 is 51889.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51889 = 19 ⋅2731.

It is a cyclic number.

It is not a de Polignac number, because 98815 - 2³ = 98807 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 9877 + ... + 9886.

It is an arithmetic number, because the mean of its divisors is an integer number (29646).

2⁹⁸⁸¹⁵ is an apocalyptic number.

98815 is a deficient number, since it is larger than the sum of its proper divisors (19769).

98815 is a wasteful number, since it uses less digits than its factorization.

98815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19768.

The product of its digits is 2880, while the sum is 31.

The square root of 98815 is about 314.3485326831. The cubic root of 98815 is about 46.2318165676.

The spelling of 98815 in words is "ninety-eight thousand, eight hundred fifteen".