843224849 has 2 divisors, whose sum is σ = 843224850. Its totient is φ = 843224848.

The previous prime is 843224839. The next prime is 843224891. The reversal of 843224849 is 948422348.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 585301249 + 257923600 = 24193^2 + 16060^2 .

It is a cyclic number.

It is not a de Polignac number, because 843224849 - 2¹² = 843220753 is a prime.

It is a super-2 number, since 2×843224849² = 1422056291942145602, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (843224839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421612424 + 421612425.

It is an arithmetic number, because the mean of its divisors is an integer number (421612425).

Almost surely, 2^843224849 is an apocalyptic number.

It is an amenable number.

843224849 is a deficient number, since it is larger than the sum of its proper divisors (1).

843224849 is an equidigital number, since it uses as much as digits as its factorization.

843224849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 442368, while the sum is 44.

The square root of 843224849 is about 29038.3341292162. The cubic root of 843224849 is about 944.7447026457.

The spelling of 843224849 in words is "eight hundred forty-three million, two hundred twenty-four thousand, eight hundred forty-nine".