2129308369 has 4 divisors (see below), whose sum is σ = 2129421040. Its totient is φ = 2129195700.

The previous prime is 2129308367. The next prime is 2129308417. The reversal of 2129308369 is 9638039212.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2129308369 - 2¹ = 2129308367 is a prime.

It is a super-2 number, since 2×2129308369² = 9067908260586880322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2129308367) 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 3 ways as a sum of consecutive naturals, for example, 20307 + ... + 68344.

It is an arithmetic number, because the mean of its divisors is an integer number (532355260).

Almost surely, 2^2129308369 is an apocalyptic number.

It is an amenable number.

2129308369 is a deficient number, since it is larger than the sum of its proper divisors (112671).

2129308369 is an equidigital number, since it uses as much as digits as its factorization.

2129308369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112670.

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 2129308369 is about 46144.4294471174. The cubic root of 2129308369 is about 1286.5090738808.

The spelling of 2129308369 in words is "two billion, one hundred twenty-nine million, three hundred eight thousand, three hundred sixty-nine".