13813434449 has 2 divisors, whose sum is σ = 13813434450. Its totient is φ = 13813434448.

The previous prime is 13813434419. The next prime is 13813434487. The reversal of 13813434449 is 94443431831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9926535424 + 3886899025 = 99632^2 + 62345^2 .

It is a cyclic number.

It is not a de Polignac number, because 13813434449 - 2¹² = 13813430353 is a prime.

It is not a weakly prime, because it can be changed into another prime (13813434409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6906717224 + 6906717225.

It is an arithmetic number, because the mean of its divisors is an integer number (6906717225).

Almost surely, 2^13813434449 is an apocalyptic number.

It is an amenable number.

13813434449 is a deficient number, since it is larger than the sum of its proper divisors (1).

13813434449 is an equidigital number, since it uses as much as digits as its factorization.

13813434449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 497664, while the sum is 44.

The spelling of 13813434449 in words is "thirteen billion, eight hundred thirteen million, four hundred thirty-four thousand, four hundred forty-nine".