13031329 has 2 divisors, whose sum is σ = 13031330. Its totient is φ = 13031328.

The previous prime is 13031309. The next prime is 13031339. The reversal of 13031329 is 92313031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10923025 + 2108304 = 3305^2 + 1452^2 .

It is a cyclic number.

It is not a de Polignac number, because 13031329 - 2⁷ = 13031201 is a prime.

It is not a weakly prime, because it can be changed into another prime (13031309) 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, 6515664 + 6515665.

It is an arithmetic number, because the mean of its divisors is an integer number (6515665).

Almost surely, 2^13031329 is an apocalyptic number.

It is an amenable number.

13031329 is a deficient number, since it is larger than the sum of its proper divisors (1).

13031329 is an equidigital number, since it uses as much as digits as its factorization.

13031329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 22.

The square root of 13031329 is about 3609.8932117169. The cubic root of 13031329 is about 235.3222017667.

The spelling of 13031329 in words is "thirteen million, thirty-one thousand, three hundred twenty-nine".