12799819 has 2 divisors, whose sum is σ = 12799820. Its totient is φ = 12799818.

The previous prime is 12799811. The next prime is 12799837. The reversal of 12799819 is 91899721.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12799819 - 2³ = 12799811 is a prime.

It is a super-2 number, since 2×12799819² = 327670732865522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12799811) 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, 6399909 + 6399910.

It is an arithmetic number, because the mean of its divisors is an integer number (6399910).

Almost surely, 2^12799819 is an apocalyptic number.

12799819 is a deficient number, since it is larger than the sum of its proper divisors (1).

12799819 is an equidigital number, since it uses as much as digits as its factorization.

12799819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 46.

The square root of 12799819 is about 3577.6834683912. The cubic root of 12799819 is about 233.9203164535.

The spelling of 12799819 in words is "twelve million, seven hundred ninety-nine thousand, eight hundred nineteen".