12937309 has 32 divisors (see below), whose sum is σ = 17510400. Its totient is φ = 9253440.

The previous prime is 12937273. The next prime is 12937333. The reversal of 12937309 is 90373921.

12937309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12937309 - 2¹³ = 12929117 is a prime.

It is a super-2 number, since 2×12937309² = 334747928322962, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12937349) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54012 + ... + 54250.

It is an arithmetic number, because the mean of its divisors is an integer number (547200).

Almost surely, 2^12937309 is an apocalyptic number.

12937309 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

12937309 is a deficient number, since it is larger than the sum of its proper divisors (4573091).

12937309 is a wasteful number, since it uses less digits than its factorization.

12937309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313.

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

The square root of 12937309 is about 3596.8470915512. The cubic root of 12937309 is about 234.7548915626.

The spelling of 12937309 in words is "twelve million, nine hundred thirty-seven thousand, three hundred nine".