813621323 has 8 divisors (see below), whose sum is σ = 816990720. Its totient is φ = 810259560.

The previous prime is 813621317. The next prime is 813621337. The reversal of 813621323 is 323126318.

813621323 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 a cyclic number.

It is not a de Polignac number, because 813621323 - 2¹⁸ = 813359179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (813621373) 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, 303278 + ... + 305948.

It is an arithmetic number, because the mean of its divisors is an integer number (102123840).

Almost surely, 2^813621323 is an apocalyptic number.

813621323 is a deficient number, since it is larger than the sum of its proper divisors (3369397).

813621323 is a wasteful number, since it uses less digits than its factorization.

813621323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3817.

The product of its digits is 5184, while the sum is 29.

The square root of 813621323 is about 28524.0481523924. The cubic root of 813621323 is about 933.5568586090.

The spelling of 813621323 in words is "eight hundred thirteen million, six hundred twenty-one thousand, three hundred twenty-three".