811443449 has 2 divisors, whose sum is σ = 811443450. Its totient is φ = 811443448.

The previous prime is 811443397. The next prime is 811443463. The reversal of 811443449 is 944344118.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 691321849 + 120121600 = 26293^2 + 10960^2 .

It is a cyclic number.

It is not a de Polignac number, because 811443449 - 2²⁴ = 794666233 is a prime.

It is not a weakly prime, because it can be changed into another prime (811403449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405721724 + 405721725.

It is an arithmetic number, because the mean of its divisors is an integer number (405721725).

Almost surely, 2^811443449 is an apocalyptic number.

It is an amenable number.

811443449 is a deficient number, since it is larger than the sum of its proper divisors (1).

811443449 is an equidigital number, since it uses as much as digits as its factorization.

811443449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55296, while the sum is 38.

The square root of 811443449 is about 28485.8464680269. The cubic root of 811443449 is about 932.7231431524.

The spelling of 811443449 in words is "eight hundred eleven million, four hundred forty-three thousand, four hundred forty-nine".