806691287 has 2 divisors, whose sum is σ = 806691288. Its totient is φ = 806691286.

The previous prime is 806691253. The next prime is 806691307. The reversal of 806691287 is 782196608.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 806691287 - 2¹⁴ = 806674903 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (806691187) 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 as a sum of consecutive naturals, namely, 403345643 + 403345644.

It is an arithmetic number, because the mean of its divisors is an integer number (403345644).

Almost surely, 2^806691287 is an apocalyptic number.

806691287 is a deficient number, since it is larger than the sum of its proper divisors (1).

806691287 is an equidigital number, since it uses as much as digits as its factorization.

806691287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 806691287 is about 28402.3112967941. The cubic root of 806691287 is about 930.8987677028.

The spelling of 806691287 in words is "eight hundred six million, six hundred ninety-one thousand, two hundred eighty-seven".