13421329 has 2 divisors, whose sum is σ = 13421330. Its totient is φ = 13421328.

The previous prime is 13421327. The next prime is 13421363. The reversal of 13421329 is 92312431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8690704 + 4730625 = 2948^2 + 2175^2 .

It is a cyclic number.

It is not a de Polignac number, because 13421329 - 2¹ = 13421327 is a prime.

Together with 13421327, it forms a pair of twin primes.

It is a nialpdrome in base 16.

It is not a weakly prime, because it can be changed into another prime (13421323) 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, 6710664 + 6710665.

It is an arithmetic number, because the mean of its divisors is an integer number (6710665).

Almost surely, 2^13421329 is an apocalyptic number.

It is an amenable number.

13421329 is a deficient number, since it is larger than the sum of its proper divisors (1).

13421329 is an equidigital number, since it uses as much as digits as its factorization.

13421329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 25.

The square root of 13421329 is about 3663.5132045620. The cubic root of 13421329 is about 237.6467289066.

The spelling of 13421329 in words is "thirteen million, four hundred twenty-one thousand, three hundred twenty-nine".