813717916 has 12 divisors (see below), whose sum is σ = 1553461560. Its totient is φ = 369871760.

The previous prime is 813717907. The next prime is 813717917. The reversal of 813717916 is 619717318.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813717917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9246751 + ... + 9246838.

It is an arithmetic number, because the mean of its divisors is an integer number (129455130).

Almost surely, 2^813717916 is an apocalyptic number.

It is an amenable number.

813717916 is a deficient number, since it is larger than the sum of its proper divisors (739743644).

813717916 is a wasteful number, since it uses less digits than its factorization.

813717916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18493604 (or 18493602 counting only the distinct ones).

The product of its digits is 63504, while the sum is 43.

The square root of 813717916 is about 28525.7412874758. The cubic root of 813717916 is about 933.5938010567.

The spelling of 813717916 in words is "eight hundred thirteen million, seven hundred seventeen thousand, nine hundred sixteen".