12992939 has 4 divisors (see below), whose sum is σ = 13206000. Its totient is φ = 12779880.

The previous prime is 12992933. The next prime is 12992971. The reversal of 12992939 is 93929921.

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-12992939 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12992939.

It is not an unprimeable number, because it can be changed into a prime (12992933) 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 3 ways as a sum of consecutive naturals, for example, 106439 + ... + 106560.

It is an arithmetic number, because the mean of its divisors is an integer number (3301500).

Almost surely, 2^12992939 is an apocalyptic number.

12992939 is a deficient number, since it is larger than the sum of its proper divisors (213061).

12992939 is an equidigital number, since it uses as much as digits as its factorization.

12992939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213060.

The product of its digits is 78732, while the sum is 44.

The square root of 12992939 is about 3604.5719579445. The cubic root of 12992939 is about 235.0908898462.

It can be divided in two parts, 12992 and 939, that added together give a palindrome (13931).

The spelling of 12992939 in words is "twelve million, nine hundred ninety-two thousand, nine hundred thirty-nine".