12309959 has 4 divisors (see below), whose sum is σ = 12323304. Its totient is φ = 12296616.

The previous prime is 12309953. The next prime is 12309961. The reversal of 12309959 is 95990321.

12309959 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12309959 - 2¹⁶ = 12244423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12309953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5177 + ... + 7170.

It is an arithmetic number, because the mean of its divisors is an integer number (3080826).

Almost surely, 2^12309959 is an apocalyptic number.

12309959 is a deficient number, since it is larger than the sum of its proper divisors (13345).

12309959 is an equidigital number, since it uses as much as digits as its factorization.

12309959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13344.

The product of its (nonzero) digits is 21870, while the sum is 38.

The square root of 12309959 is about 3508.5551157136. Note that the first 3 decimals coincide. The cubic root of 12309959 is about 230.8973076023.

The spelling of 12309959 in words is "twelve million, three hundred nine thousand, nine hundred fifty-nine".