12347109 has 12 divisors (see below), whose sum is σ = 18270252. Its totient is φ = 8030400.

The previous prime is 12347099. The next prime is 12347123. The reversal of 12347109 is 90174321.

It can be written as a sum of positive squares in 2 ways, for example, as 2873025 + 9474084 = 1695^2 + 3078^2 .

It is not a de Polignac number, because 12347109 - 2⁵ = 12347077 is a prime.

It is a super-2 number, since 2×12347109² = 304902201315762, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12347189) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16362 + ... + 17099.

It is an arithmetic number, because the mean of its divisors is an integer number (1522521).

Almost surely, 2^12347109 is an apocalyptic number.

It is an amenable number.

12347109 is a deficient number, since it is larger than the sum of its proper divisors (5923143).

12347109 is a wasteful number, since it uses less digits than its factorization.

12347109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33508 (or 33505 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 12347109 is about 3513.8453295500. The cubic root of 12347109 is about 231.1293479216.

The spelling of 12347109 in words is "twelve million, three hundred forty-seven thousand, one hundred nine".