2098709 has 4 divisors (see below), whose sum is σ = 2122380. Its totient is φ = 2075040.

The previous prime is 2098699. The next prime is 2098711. The reversal of 2098709 is 9078902.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 485809 + 1612900 = 697^2 + 1270^2 .

It is a cyclic number.

It is not a de Polignac number, because 2098709 - 2⁴ = 2098693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2098729) 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, 11702 + ... + 11879.

It is an arithmetic number, because the mean of its divisors is an integer number (530595).

2^2098709 is an apocalyptic number.

It is an amenable number.

2098709 is a deficient number, since it is larger than the sum of its proper divisors (23671).

2098709 is an equidigital number, since it uses as much as digits as its factorization.

2098709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23670.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 2098709 is about 1448.6921688199. The cubic root of 2098709 is about 128.0316694099.

The spelling of 2098709 in words is "two million, ninety-eight thousand, seven hundred nine".