98661 has 4 divisors (see below), whose sum is σ = 131552. Its totient is φ = 65772.

The previous prime is 98641. The next prime is 98663. The reversal of 98661 is 16689.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16689 = 3 ⋅5563.

It is not a de Polignac number, because 98661 - 2⁶ = 98597 is a prime.

It is a D-number.

It is a Duffinian number.

98661 is a lucky number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98663) 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, 16441 + ... + 16446.

It is an arithmetic number, because the mean of its divisors is an integer number (32888).

2⁹⁸⁶⁶¹ is an apocalyptic number.

It is an amenable number.

98661 is a deficient number, since it is larger than the sum of its proper divisors (32891).

98661 is a wasteful number, since it uses less digits than its factorization.

98661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32890.

The product of its digits is 2592, while the sum is 30.

The square root of 98661 is about 314.1034861316. The cubic root of 98661 is about 46.2077871471.

Subtracting from 98661 its product of digits (2592), we obtain a palindrome (96069).

The spelling of 98661 in words is "ninety-eight thousand, six hundred sixty-one".