818478493 has 8 divisors (see below), whose sum is σ = 943986560. Its totient is φ = 695116080.

The previous prime is 818478491. The next prime is 818478509. The reversal of 818478493 is 394874818.

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 818478493 - 2¹ = 818478491 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 818478493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (818478491) 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 in 7 ways as a sum of consecutive naturals, for example, 535593 + ... + 537118.

It is an arithmetic number, because the mean of its divisors is an integer number (117998320).

Almost surely, 2^818478493 is an apocalyptic number.

It is an amenable number.

818478493 is a deficient number, since it is larger than the sum of its proper divisors (125508067).

818478493 is a wasteful number, since it uses less digits than its factorization.

818478493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072827.

The product of its digits is 1548288, while the sum is 52.

The square root of 818478493 is about 28609.0631269184. The cubic root of 818478493 is about 935.4108951163.

The spelling of 818478493 in words is "eight hundred eighteen million, four hundred seventy-eight thousand, four hundred ninety-three".