809680037 has 4 divisors (see below), whose sum is σ = 809741196. Its totient is φ = 809618880.

The previous prime is 809680033. The next prime is 809680057. The reversal of 809680037 is 730086908.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 475850596 + 333829441 = 21814^2 + 18271^2 .

It is a cyclic number.

It is not a de Polignac number, because 809680037 - 2² = 809680033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 809679976 and 809680003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809680031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1508 + ... + 40269.

It is an arithmetic number, because the mean of its divisors is an integer number (202435299).

Almost surely, 2^809680037 is an apocalyptic number.

It is an amenable number.

809680037 is a deficient number, since it is larger than the sum of its proper divisors (61159).

809680037 is a wasteful number, since it uses less digits than its factorization.

809680037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61158.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 809680037 is about 28454.8772093643. The cubic root of 809680037 is about 932.0469949502.

The spelling of 809680037 in words is "eight hundred nine million, six hundred eighty thousand, thirty-seven".