13815449 has 2 divisors, whose sum is σ = 13815450. Its totient is φ = 13815448.

The previous prime is 13815437. The next prime is 13815481. The reversal of 13815449 is 94451831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9985600 + 3829849 = 3160^2 + 1957^2 .

It is a cyclic number.

It is not a de Polignac number, because 13815449 - 2¹⁶ = 13749913 is a prime.

It is not a weakly prime, because it can be changed into another prime (13815149) 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, 6907724 + 6907725.

It is an arithmetic number, because the mean of its divisors is an integer number (6907725).

Almost surely, 2^13815449 is an apocalyptic number.

It is an amenable number.

13815449 is a deficient number, since it is larger than the sum of its proper divisors (1).

13815449 is an equidigital number, since it uses as much as digits as its factorization.

13815449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 35.

The square root of 13815449 is about 3716.9139080694. The cubic root of 13815449 is about 239.9505048396.

The spelling of 13815449 in words is "thirteen million, eight hundred fifteen thousand, four hundred forty-nine".