399283 has 2 divisors, whose sum is σ = 399284. Its totient is φ = 399282.

The previous prime is 399281. The next prime is 399353. The reversal of 399283 is 382993.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 399283 - 2¹ = 399281 is a prime.

Together with 399281, it forms a pair of twin primes.

399283 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (399281) 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, 199641 + 199642.

It is an arithmetic number, because the mean of its divisors is an integer number (199642).

2³⁹⁹²⁸³ is an apocalyptic number.

399283 is a deficient number, since it is larger than the sum of its proper divisors (1).

399283 is an equidigital number, since it uses as much as digits as its factorization.

399283 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 34.

The square root of 399283 is about 631.8884395208. Note that the first 3 decimals coincide. The cubic root of 399283 is about 73.6365794657.

Subtracting from 399283 its reverse (382993), we obtain a triangular number (16290 = T₁₈₀).

The spelling of 399283 in words is "three hundred ninety-nine thousand, two hundred eighty-three".