999287 has 2 divisors, whose sum is σ = 999288. Its totient is φ = 999286.

The previous prime is 999269. The next prime is 999307. The reversal of 999287 is 782999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999287 - 2¹⁴ = 982903 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 (999217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499643 + 499644.

It is an arithmetic number, because the mean of its divisors is an integer number (499644).

2⁹⁹⁹²⁸⁷ is an apocalyptic number.

999287 is a deficient number, since it is larger than the sum of its proper divisors (1).

999287 is an equidigital number, since it uses as much as digits as its factorization.

999287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 44.

The square root of 999287 is about 999.6434364312. The cubic root of 999287 is about 99.9762276826.

The spelling of 999287 in words is "nine hundred ninety-nine thousand, two hundred eighty-seven".