818422079 has 4 divisors (see below), whose sum is σ = 846643560. Its totient is φ = 790200600.

The previous prime is 818422069. The next prime is 818422091. The reversal of 818422079 is 970224818.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 970224818 = 2 ⋅485112409.

It is a cyclic number.

It is not a de Polignac number, because 818422079 - 2⁴ = 818422063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (818422019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14110697 + ... + 14110754.

It is an arithmetic number, because the mean of its divisors is an integer number (211660890).

Almost surely, 2^818422079 is an apocalyptic number.

818422079 is a deficient number, since it is larger than the sum of its proper divisors (28221481).

818422079 is a wasteful number, since it uses less digits than its factorization.

818422079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28221480.

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 818422079 is about 28608.0771636264. The cubic root of 818422079 is about 935.3894034163.

The spelling of 818422079 in words is "eight hundred eighteen million, four hundred twenty-two thousand, seventy-nine".