2009209723 has 8 divisors (see below), whose sum is σ = 2032222208. Its totient is φ = 1986309864.

The previous prime is 2009209693. The next prime is 2009209747. The reversal of 2009209723 is 3279029002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2009209723 - 2⁹ = 2009209211 is a prime.

It is a super-3 number, since 3×2009209723³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2009201723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7990 + ... + 63892.

It is an arithmetic number, because the mean of its divisors is an integer number (254027776).

Almost surely, 2^2009209723 is an apocalyptic number.

2009209723 is a deficient number, since it is larger than the sum of its proper divisors (23012485).

2009209723 is a wasteful number, since it uses less digits than its factorization.

2009209723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56313.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 2009209723 is about 44824.2091173955. The cubic root of 2009209723 is about 1261.8520096321.

The spelling of 2009209723 in words is "two billion, nine million, two hundred nine thousand, seven hundred twenty-three".