2102363702209 has 3 divisors (see below), whose sum is σ = 2102365152163. Its totient is φ = 2102362252256.

The previous prime is 2102363702177. The next prime is 2102363702239. The reversal of 2102363702209 is 9022073632012.

The square root of 2102363702209 is 1449953.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 557493689025 + 1544870013184 = 746655^2 + 1242928^2 .

It is not a de Polignac number, because 2102363702209 - 2⁵ = 2102363702177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2102363702239) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 724977 + ... + 2174929.

Almost surely, 2^{2102363702209} is an apocalyptic number.

2102363702209 is the 1449953-rd square number.

2102363702209 is the 724977-th centered octagonal number.

It is an amenable number.

2102363702209 is a deficient number, since it is larger than the sum of its proper divisors (1449954).

2102363702209 is an frugal number, since it uses more digits than its factorization.

2102363702209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2899906 (or 1449953 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 37.

The spelling of 2102363702209 in words is "two trillion, one hundred two billion, three hundred sixty-three million, seven hundred two thousand, two hundred nine".