818369421 has 8 divisors (see below), whose sum is σ = 1116535200. Its totient is φ = 532891632.

The previous prime is 818369393. The next prime is 818369437. The reversal of 818369421 is 124963818.

818369421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 818369421 - 2¹⁷ = 818238349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (818369521) 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, 3171846 + ... + 3172103.

It is an arithmetic number, because the mean of its divisors is an integer number (139566900).

Almost surely, 2^818369421 is an apocalyptic number.

It is an amenable number.

818369421 is a deficient number, since it is larger than the sum of its proper divisors (298165779).

818369421 is a wasteful number, since it uses less digits than its factorization.

818369421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6343995.

The product of its digits is 82944, while the sum is 42.

The square root of 818369421 is about 28607.1568143358. The cubic root of 818369421 is about 935.3693417256.

The spelling of 818369421 in words is "eight hundred eighteen million, three hundred sixty-nine thousand, four hundred twenty-one".