806793509 has 2 divisors, whose sum is σ = 806793510. Its totient is φ = 806793508.

The previous prime is 806793487. The next prime is 806793511. The reversal of 806793509 is 905397608.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 552391009 + 254402500 = 23503^2 + 15950^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-806793509 is a prime.

Together with 806793511, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (806793539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 403396754 + 403396755.

It is an arithmetic number, because the mean of its divisors is an integer number (403396755).

Almost surely, 2^806793509 is an apocalyptic number.

It is an amenable number.

806793509 is a deficient number, since it is larger than the sum of its proper divisors (1).

806793509 is an equidigital number, since it uses as much as digits as its factorization.

806793509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 806793509 is about 28404.1107764352. The cubic root of 806793509 is about 930.9380864675.

The spelling of 806793509 in words is "eight hundred six million, seven hundred ninety-three thousand, five hundred nine".