818404819 has 8 divisors (see below), whose sum is σ = 821552832. Its totient is φ = 815263680.

The previous prime is 818404789. The next prime is 818404823. The reversal of 818404819 is 918404818.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 818404819 - 2⁵ = 818404787 is a prime.

It is a super-2 number, since 2×818404819² = 1339572895524845522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (818404849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 379047 + ... + 381199.

It is an arithmetic number, because the mean of its divisors is an integer number (102694104).

Almost surely, 2^818404819 is an apocalyptic number.

818404819 is a deficient number, since it is larger than the sum of its proper divisors (3148013).

818404819 is a wasteful number, since it uses less digits than its factorization.

818404819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3437.

The product of its (nonzero) digits is 73728, while the sum is 43.

The square root of 818404819 is about 28607.7754989793. The cubic root of 818404819 is about 935.3828277813.

Subtracting 818404819 from its reverse (918404818), we obtain a palindrome (99999999).

The spelling of 818404819 in words is "eight hundred eighteen million, four hundred four thousand, eight hundred nineteen".