804408019 has 2 divisors, whose sum is σ = 804408020. Its totient is φ = 804408018.

The previous prime is 804408013. The next prime is 804408047. The reversal of 804408019 is 910804408.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 804408019 - 2⁹ = 804407507 is a prime.

It is a super-2 number, since 2×804408019² = 1294144522063008722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (804408013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402204009 + 402204010.

It is an arithmetic number, because the mean of its divisors is an integer number (402204010).

Almost surely, 2^804408019 is an apocalyptic number.

804408019 is a deficient number, since it is larger than the sum of its proper divisors (1).

804408019 is an equidigital number, since it uses as much as digits as its factorization.

804408019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 804408019 is about 28362.0877052448. The cubic root of 804408019 is about 930.0196623584.

The spelling of 804408019 in words is "eight hundred four million, four hundred eight thousand, nineteen".