12309739 has 24 divisors (see below), whose sum is σ = 14551152. Its totient is φ = 10342080.

The previous prime is 12309721. The next prime is 12309749. The reversal of 12309739 is 93790321.

It is not a de Polignac number, because 12309739 - 2⁵ = 12309707 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 (12309719) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 201769 + ... + 201829.

It is an arithmetic number, because the mean of its divisors is an integer number (606298).

Almost surely, 2^12309739 is an apocalyptic number.

12309739 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

12309739 is a deficient number, since it is larger than the sum of its proper divisors (2241413).

12309739 is a wasteful number, since it uses less digits than its factorization.

12309739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155 (or 136 counting only the distinct ones).

The product of its (nonzero) digits is 10206, while the sum is 34.

The square root of 12309739 is about 3508.5237636362. The cubic root of 12309739 is about 230.8959320843.

The spelling of 12309739 in words is "twelve million, three hundred nine thousand, seven hundred thirty-nine".