813681427 has 6 divisors (see below), whose sum is σ = 881087172. Its totient is φ = 751090392.

The previous prime is 813681413. The next prime is 813681431. The reversal of 813681427 is 724186318.

It is not a de Polignac number, because 813681427 - 2¹⁵ = 813648659 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 813681427.

It is not an unprimeable number, because it can be changed into a prime (813681457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2407173 + ... + 2407510.

It is an arithmetic number, because the mean of its divisors is an integer number (146847862).

Almost surely, 2^813681427 is an apocalyptic number.

813681427 is a deficient number, since it is larger than the sum of its proper divisors (67405745).

813681427 is a wasteful number, since it uses less digits than its factorization.

813681427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4814709 (or 4814696 counting only the distinct ones).

The product of its digits is 64512, while the sum is 40.

The square root of 813681427 is about 28525.1017000816. The cubic root of 813681427 is about 933.5798460104.

The spelling of 813681427 in words is "eight hundred thirteen million, six hundred eighty-one thousand, four hundred twenty-seven".