2098509 has 8 divisors (see below), whose sum is σ = 3197760. Its totient is φ = 1199136.

The previous prime is 2098471. The next prime is 2098511. The reversal of 2098509 is 9058902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2098509 - 2⁸ = 2098253 is a prime.

It is a Curzon number.

2098509 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2098509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2098519) 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 7 ways as a sum of consecutive naturals, for example, 49944 + ... + 49985.

It is an arithmetic number, because the mean of its divisors is an integer number (399720).

2^2098509 is an apocalyptic number.

It is an amenable number.

2098509 is a deficient number, since it is larger than the sum of its proper divisors (1099251).

2098509 is an equidigital number, since it uses as much as digits as its factorization.

2098509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99939.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 2098509 is about 1448.6231393982. The cubic root of 2098509 is about 128.0276022830.

The spelling of 2098509 in words is "two million, ninety-eight thousand, five hundred nine".