13040449 has 2 divisors, whose sum is σ = 13040450. Its totient is φ = 13040448.

The previous prime is 13040381. The next prime is 13040483. The reversal of 13040449 is 94404031.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10284849 + 2755600 = 3207^2 + 1660^2 .

It is an emirp because it is prime and its reverse (94404031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13040449 - 2¹⁵ = 13007681 is a prime.

It is not a weakly prime, because it can be changed into another prime (13040549) 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, 6520224 + 6520225.

It is an arithmetic number, because the mean of its divisors is an integer number (6520225).

Almost surely, 2^13040449 is an apocalyptic number.

It is an amenable number.

13040449 is a deficient number, since it is larger than the sum of its proper divisors (1).

13040449 is an equidigital number, since it uses as much as digits as its factorization.

13040449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 13040449 is about 3611.1561860435. The cubic root of 13040449 is about 235.3770858596.

The spelling of 13040449 in words is "thirteen million, forty thousand, four hundred forty-nine".