13329997 has 2 divisors, whose sum is σ = 13329998. Its totient is φ = 13329996.

The previous prime is 13329991. The next prime is 13330007. The reversal of 13329997 is 79992331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13329801 + 196 = 3651^2 + 14^2 .

It is an emirp because it is prime and its reverse (79992331) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13329997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13329991) 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, 6664998 + 6664999.

It is an arithmetic number, because the mean of its divisors is an integer number (6664999).

Almost surely, 2^13329997 is an apocalyptic number.

It is an amenable number.

13329997 is a deficient number, since it is larger than the sum of its proper divisors (1).

13329997 is an equidigital number, since it uses as much as digits as its factorization.

13329997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 91854, while the sum is 43.

The square root of 13329997 is about 3651.0268418624. The cubic root of 13329997 is about 237.1064403466.

The spelling of 13329997 in words is "thirteen million, three hundred twenty-nine thousand, nine hundred ninety-seven".