813491363 has 8 divisors (see below), whose sum is σ = 817684560. Its totient is φ = 809308800.

The previous prime is 813491359. The next prime is 813491387. The reversal of 813491363 is 363194318.

It is a happy number.

813491363 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 813491363 - 2² = 813491359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (813491563) 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, 182303 + ... + 186711.

It is an arithmetic number, because the mean of its divisors is an integer number (102210570).

Almost surely, 2^813491363 is an apocalyptic number.

813491363 is a deficient number, since it is larger than the sum of its proper divisors (4193197).

813491363 is a wasteful number, since it uses less digits than its factorization.

813491363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5317.

The product of its digits is 46656, while the sum is 38.

The square root of 813491363 is about 28521.7699836458. The cubic root of 813491363 is about 933.5071501815.

The spelling of 813491363 in words is "eight hundred thirteen million, four hundred ninety-one thousand, three hundred sixty-three".