813485873 has 8 divisors (see below), whose sum is σ = 878126400. Its totient is φ = 751284688.

The previous prime is 813485833. The next prime is 813485909. The reversal of 813485873 is 378584318.

It is a happy number.

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 813485873 - 2¹⁸ = 813223729 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (813485833) 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, 609143 + ... + 610476.

It is an arithmetic number, because the mean of its divisors is an integer number (109765800).

Almost surely, 2^813485873 is an apocalyptic number.

It is an amenable number.

813485873 is a deficient number, since it is larger than the sum of its proper divisors (64640527).

813485873 is a wasteful number, since it uses less digits than its factorization.

813485873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1219671.

The product of its digits is 645120, while the sum is 47.

The square root of 813485873 is about 28521.6737412095. The cubic root of 813485873 is about 933.5050501937.

The spelling of 813485873 in words is "eight hundred thirteen million, four hundred eighty-five thousand, eight hundred seventy-three".