804144457 has 2 divisors, whose sum is σ = 804144458. Its totient is φ = 804144456.

The previous prime is 804144431. The next prime is 804144487. The reversal of 804144457 is 754441408.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 489117456 + 315027001 = 22116^2 + 17749^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-804144457 is a prime.

It is not a weakly prime, because it can be changed into another prime (804144427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402072228 + 402072229.

It is an arithmetic number, because the mean of its divisors is an integer number (402072229).

Almost surely, 2^804144457 is an apocalyptic number.

It is an amenable number.

804144457 is a deficient number, since it is larger than the sum of its proper divisors (1).

804144457 is an equidigital number, since it uses as much as digits as its factorization.

804144457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 71680, while the sum is 37.

The square root of 804144457 is about 28357.4409458964. The cubic root of 804144457 is about 929.9180784971.

The spelling of 804144457 in words is "eight hundred four million, one hundred forty-four thousand, four hundred fifty-seven".