804443749 has 2 divisors, whose sum is σ = 804443750. Its totient is φ = 804443748.

The previous prime is 804443747. The next prime is 804443779. The reversal of 804443749 is 947344408.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 522808225 + 281635524 = 22865^2 + 16782^2 .

It is a cyclic number.

It is not a de Polignac number, because 804443749 - 2¹ = 804443747 is a prime.

Together with 804443747, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (804443747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402221874 + 402221875.

It is an arithmetic number, because the mean of its divisors is an integer number (402221875).

Almost surely, 2^804443749 is an apocalyptic number.

It is an amenable number.

804443749 is a deficient number, since it is larger than the sum of its proper divisors (1).

804443749 is an equidigital number, since it uses as much as digits as its factorization.

804443749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 387072, while the sum is 43.

The square root of 804443749 is about 28362.7175884117. The cubic root of 804443749 is about 930.0334319504.

The spelling of 804443749 in words is "eight hundred four million, four hundred forty-three thousand, seven hundred forty-nine".