398287 has 2 divisors, whose sum is σ = 398288. Its totient is φ = 398286.

The previous prime is 398273. The next prime is 398303. The reversal of 398287 is 782893.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 398287 - 2¹¹ = 396239 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a nialpdrome in base 9 and base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398207) 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, 199143 + 199144.

It is an arithmetic number, because the mean of its divisors is an integer number (199144).

2³⁹⁸²⁸⁷ is an apocalyptic number.

398287 is a deficient number, since it is larger than the sum of its proper divisors (1).

398287 is an equidigital number, since it uses as much as digits as its factorization.

398287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 37.

The square root of 398287 is about 631.0998336238. The cubic root of 398287 is about 73.5753003721.

The spelling of 398287 in words is "three hundred ninety-eight thousand, two hundred eighty-seven".