804377681 has 2 divisors, whose sum is σ = 804377682. Its totient is φ = 804377680.

The previous prime is 804377671. The next prime is 804377699. The reversal of 804377681 is 186773408.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 690848656 + 113529025 = 26284^2 + 10655^2 .

It is a cyclic number.

It is not a de Polignac number, because 804377681 - 2⁶ = 804377617 is a prime.

It is a super-2 number, since 2×804377681² = 1294046907381875522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (804377671) 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, 402188840 + 402188841.

It is an arithmetic number, because the mean of its divisors is an integer number (402188841).

Almost surely, 2^804377681 is an apocalyptic number.

It is an amenable number.

804377681 is a deficient number, since it is larger than the sum of its proper divisors (1).

804377681 is an equidigital number, since it uses as much as digits as its factorization.

804377681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 225792, while the sum is 44.

The square root of 804377681 is about 28361.5528665128. The cubic root of 804377681 is about 930.0079704100.

The spelling of 804377681 in words is "eight hundred four million, three hundred seventy-seven thousand, six hundred eighty-one".