98409 has 4 divisors (see below), whose sum is σ = 131216. Its totient is φ = 65604.

The previous prime is 98407. The next prime is 98411. The reversal of 98409 is 90489.

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.

It is an interprime number because it is at equal distance from previous prime (98407) and next prime (98411).

It is not a de Polignac number, because 98409 - 2¹ = 98407 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (98407) 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, 16399 + ... + 16404.

It is an arithmetic number, because the mean of its divisors is an integer number (32804).

2⁹⁸⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

98409 is a deficient number, since it is larger than the sum of its proper divisors (32807).

98409 is a wasteful number, since it uses less digits than its factorization.

98409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32806.

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

The square root of 98409 is about 313.7020879752. The cubic root of 98409 is about 46.1684122828.

The spelling of 98409 in words is "ninety-eight thousand, four hundred nine".