12913819 has 2 divisors, whose sum is σ = 12913820. Its totient is φ = 12913818.

The previous prime is 12913801. The next prime is 12913843. The reversal of 12913819 is 91831921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12913819 - 2¹⁵ = 12881051 is a prime.

It is a super-2 number, since 2×12913819² = 333533442329522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12910819) 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 as a sum of consecutive naturals, namely, 6456909 + 6456910.

It is an arithmetic number, because the mean of its divisors is an integer number (6456910).

Almost surely, 2^12913819 is an apocalyptic number.

12913819 is a deficient number, since it is larger than the sum of its proper divisors (1).

12913819 is an equidigital number, since it uses as much as digits as its factorization.

12913819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 34.

The square root of 12913819 is about 3593.5802481648. The cubic root of 12913819 is about 234.6127256447.

The spelling of 12913819 in words is "twelve million, nine hundred thirteen thousand, eight hundred nineteen".