2098309 has 4 divisors (see below), whose sum is σ = 2104704. Its totient is φ = 2091916.

The previous prime is 2098289. The next prime is 2098321. The reversal of 2098309 is 9038902.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 2098309 - 2⁵ = 2098277 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.

2098309 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2098009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2677 + ... + 3370.

It is an arithmetic number, because the mean of its divisors is an integer number (526176).

2^2098309 is an apocalyptic number.

It is an amenable number.

2098309 is a deficient number, since it is larger than the sum of its proper divisors (6395).

2098309 is an equidigital number, since it uses as much as digits as its factorization.

2098309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6394.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 2098309 is about 1448.5541066871. The cubic root of 2098309 is about 128.0235348977.

The spelling of 2098309 in words is "two million, ninety-eight thousand, three hundred nine".