12739819 has 2 divisors, whose sum is σ = 12739820. Its totient is φ = 12739818.

The previous prime is 12739801. The next prime is 12739841. The reversal of 12739819 is 91893721.

12739819 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12739819 - 2⁷ = 12739691 is a prime.

It is a super-2 number, since 2×12739819² = 324605976305522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12739879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6369909 + 6369910.

It is an arithmetic number, because the mean of its divisors is an integer number (6369910).

Almost surely, 2^12739819 is an apocalyptic number.

12739819 is a deficient number, since it is larger than the sum of its proper divisors (1).

12739819 is an equidigital number, since it uses as much as digits as its factorization.

12739819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 40.

The square root of 12739819 is about 3569.2883044103. The cubic root of 12739819 is about 233.5542381879.

The spelling of 12739819 in words is "twelve million, seven hundred thirty-nine thousand, eight hundred nineteen".