98579 has 4 divisors (see below), whose sum is σ = 106176. Its totient is φ = 90984.

The previous prime is 98573. The next prime is 98597. The reversal of 98579 is 97589.

98579 = 30² + 31² + ... + 68².

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97589 = 23 ⋅4243.

It is a cyclic number.

It is not a de Polignac number, because 98579 - 2⁴ = 98563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (98573) 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, 3779 + ... + 3804.

It is an arithmetic number, because the mean of its divisors is an integer number (26544).

2⁹⁸⁵⁷⁹ is an apocalyptic number.

98579 is a deficient number, since it is larger than the sum of its proper divisors (7597).

98579 is a wasteful number, since it uses less digits than its factorization.

98579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7596.

The product of its digits is 22680, while the sum is 38.

The square root of 98579 is about 313.9729287693. The cubic root of 98579 is about 46.1949820578.

Subtracting from 98579 its reverse (97589), we obtain a triangular number (990 = T₄₄).

It can be divided in two parts, 985 and 79, that multiplied together give a triangular number (77815 = T₃₉₄).

The spelling of 98579 in words is "ninety-eight thousand, five hundred seventy-nine".