818843474 has 4 divisors (see below), whose sum is σ = 1228265214. Its totient is φ = 409421736.

The previous prime is 818843371. The next prime is 818843479. The reversal of 818843474 is 474348818.

818843474 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 818360449 + 483025 = 28607^2 + 695^2 .

It is not an unprimeable number, because it can be changed into a prime (818843479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204710867 + ... + 204710870.

Almost surely, 2^818843474 is an apocalyptic number.

818843474 is a deficient number, since it is larger than the sum of its proper divisors (409421740).

818843474 is a wasteful number, since it uses less digits than its factorization.

818843474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409421739.

The product of its digits is 688128, while the sum is 47.

The square root of 818843474 is about 28615.4411812923. The cubic root of 818843474 is about 935.5499158610.

It can be divided in two parts, 81884 and 3474, that added together give a palindrome (85358).

The spelling of 818843474 in words is "eight hundred eighteen million, eight hundred forty-three thousand, four hundred seventy-four".