12995309 has 2 divisors, whose sum is σ = 12995310. Its totient is φ = 12995308.

The previous prime is 12995291. The next prime is 12995321. The reversal of 12995309 is 90359921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12145225 + 850084 = 3485^2 + 922^2 .

It is an emirp because it is prime and its reverse (90359921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12995309 - 2⁸ = 12995053 is a prime.

It is a super-3 number, since 3×12995309³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12995329) 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, 6497654 + 6497655.

It is an arithmetic number, because the mean of its divisors is an integer number (6497655).

Almost surely, 2^12995309 is an apocalyptic number.

It is an amenable number.

12995309 is a deficient number, since it is larger than the sum of its proper divisors (1).

12995309 is an equidigital number, since it uses as much as digits as its factorization.

12995309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21870, while the sum is 38.

The square root of 12995309 is about 3604.9006921134. The cubic root of 12995309 is about 235.1051830336.

The spelling of 12995309 in words is "twelve million, nine hundred ninety-five thousand, three hundred nine".