843637049 has 2 divisors, whose sum is σ = 843637050. Its totient is φ = 843637048.

The previous prime is 843637013. The next prime is 843637051. The reversal of 843637049 is 940736348.

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., 841290025 + 2347024 = 29005^2 + 1532^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-843637049 is a prime.

Together with 843637051, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (843637099) 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, 421818524 + 421818525.

It is an arithmetic number, because the mean of its divisors is an integer number (421818525).

Almost surely, 2^843637049 is an apocalyptic number.

It is an amenable number.

843637049 is a deficient number, since it is larger than the sum of its proper divisors (1).

843637049 is an equidigital number, since it uses as much as digits as its factorization.

843637049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 44.

The square root of 843637049 is about 29045.4307766299. The cubic root of 843637049 is about 944.8986198084.

The spelling of 843637049 in words is "eight hundred forty-three million, six hundred thirty-seven thousand, forty-nine".