12908939 has 4 divisors (see below), whose sum is σ = 12926880. Its totient is φ = 12891000.

The previous prime is 12908921. The next prime is 12908953. The reversal of 12908939 is 93980921.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12908939 is a prime.

It is a super-2 number, since 2×12908939² = 333281412211442, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12908896 and 12908905.

It is not an unprimeable number, because it can be changed into a prime (12908969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7844 + ... + 9345.

It is an arithmetic number, because the mean of its divisors is an integer number (3231720).

Almost surely, 2^12908939 is an apocalyptic number.

12908939 is a deficient number, since it is larger than the sum of its proper divisors (17941).

12908939 is an equidigital number, since it uses as much as digits as its factorization.

12908939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17940.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 12908939 is about 3592.9011954130. The cubic root of 12908939 is about 234.5831693389.

The spelling of 12908939 in words is "twelve million, nine hundred eight thousand, nine hundred thirty-nine".