2198007709 has 4 divisors (see below), whose sum is σ = 2210151580. Its totient is φ = 2185863840.

The previous prime is 2198007683. The next prime is 2198007727. The reversal of 2198007709 is 9077008912.

It is a happy number.

2198007709 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 434847609 + 1763160100 = 20853^2 + 41990^2 .

It is a cyclic number.

It is not a de Polignac number, because 2198007709 - 2⁵ = 2198007677 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 (2198004709) 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, 6071664 + ... + 6072025.

It is an arithmetic number, because the mean of its divisors is an integer number (552537895).

Almost surely, 2^2198007709 is an apocalyptic number.

It is an amenable number.

2198007709 is a deficient number, since it is larger than the sum of its proper divisors (12143871).

2198007709 is a wasteful number, since it uses less digits than its factorization.

2198007709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12143870.

The product of its (nonzero) digits is 63504, while the sum is 43.

The square root of 2198007709 is about 46882.9148944474. The cubic root of 2198007709 is about 1300.1987287907.

The spelling of 2198007709 in words is "two billion, one hundred ninety-eight million, seven thousand, seven hundred nine".