813287 has 2 divisors, whose sum is σ = 813288. Its totient is φ = 813286.

The previous prime is 813283. The next prime is 813299. The reversal of 813287 is 782318.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 813287 - 2² = 813283 is a prime.

It is a super-2 number, since 2×813287² = 1322871488738, which contains 22 as substring.

It is a Chen prime.

It is equal to p₆₄₉₂₈ and since 813287 and 64928 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (813283) 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 as a sum of consecutive naturals, namely, 406643 + 406644.

It is an arithmetic number, because the mean of its divisors is an integer number (406644).

2⁸¹³²⁸⁷ is an apocalyptic number.

813287 is a deficient number, since it is larger than the sum of its proper divisors (1).

813287 is an equidigital number, since it uses as much as digits as its factorization.

813287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2688, while the sum is 29.

The square root of 813287 is about 901.8242622596. The cubic root of 813287 is about 93.3428972626.

The spelling of 813287 in words is "eight hundred thirteen thousand, two hundred eighty-seven".