12357909 has 12 divisors (see below), whose sum is σ = 17955756. Its totient is φ = 8189952.

The previous prime is 12357907. The next prime is 12357931. The reversal of 12357909 is 90975321.

It can be written as a sum of positive squares in 2 ways, for example, as 11881809 + 476100 = 3447^2 + 690^2 .

It is not a de Polignac number, because 12357909 - 2¹ = 12357907 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12357907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2412 + ... + 5525.

It is an arithmetic number, because the mean of its divisors is an integer number (1496313).

Almost surely, 2^12357909 is an apocalyptic number.

It is an amenable number.

12357909 is a deficient number, since it is larger than the sum of its proper divisors (5597847).

12357909 is a wasteful number, since it uses less digits than its factorization.

12357909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8116 (or 8113 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 36.

The square root of 12357909 is about 3515.3817715861. The cubic root of 12357909 is about 231.1967177948.

The spelling of 12357909 in words is "twelve million, three hundred fifty-seven thousand, nine hundred nine".