2012008913209 has 3 divisors (see below), whose sum is σ = 2012010331663. Its totient is φ = 2012007494756.

The previous prime is 2012008913179. The next prime is 2012008913251. The reversal of 2012008913209 is 9023198002102.

The square root of 2012008913209 is 1418453.

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., 1828458362025 + 183550551184 = 1352205^2 + 428428^2 .

It is not a de Polignac number, because 2012008913209 - 2⁷ = 2012008913081 is a prime.

It is a super-2 number, since 2×2012008913209² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2012008910209) 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, 709227 + ... + 2127679.

Almost surely, 2^{2012008913209} is an apocalyptic number.

2012008913209 is the 1418453-rd square number.

2012008913209 is the 709227-th centered octagonal number.

It is an amenable number.

2012008913209 is a deficient number, since it is larger than the sum of its proper divisors (1418454).

2012008913209 is an frugal number, since it uses more digits than its factorization.

2012008913209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2836906 (or 1418453 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 37.

The spelling of 2012008913209 in words is "two trillion, twelve billion, eight million, nine hundred thirteen thousand, two hundred nine".