2123144009 has 4 divisors (see below), whose sum is σ = 2426450304. Its totient is φ = 1819837716.

The previous prime is 2123143993. The next prime is 2123144017. The reversal of 2123144009 is 9004413212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2123144009 - 2⁴ = 2123143993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2123144069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151653137 + ... + 151653150.

It is an arithmetic number, because the mean of its divisors is an integer number (606612576).

Almost surely, 2^2123144009 is an apocalyptic number.

It is an amenable number.

2123144009 is a deficient number, since it is larger than the sum of its proper divisors (303306295).

2123144009 is an equidigital number, since it uses as much as digits as its factorization.

2123144009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303306294.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 2123144009 is about 46077.5868400245. The cubic root of 2123144009 is about 1285.2663901883.

The spelling of 2123144009 in words is "two billion, one hundred twenty-three million, one hundred forty-four thousand, nine".