12939919 has 2 divisors, whose sum is σ = 12939920. Its totient is φ = 12939918.

The previous prime is 12939889. The next prime is 12939923. The reversal of 12939919 is 91993921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12939919 - 2¹⁵ = 12907151 is a prime.

It is a super-2 number, since 2×12939919² = 334883007453122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12939929) 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 as a sum of consecutive naturals, namely, 6469959 + 6469960.

It is an arithmetic number, because the mean of its divisors is an integer number (6469960).

Almost surely, 2^12939919 is an apocalyptic number.

12939919 is a deficient number, since it is larger than the sum of its proper divisors (1).

12939919 is an equidigital number, since it uses as much as digits as its factorization.

12939919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 39366, while the sum is 43.

The square root of 12939919 is about 3597.2098910128. The cubic root of 12939919 is about 234.7706771501.

The spelling of 12939919 in words is "twelve million, nine hundred thirty-nine thousand, nine hundred nineteen".