399163 has 2 divisors, whose sum is σ = 399164. Its totient is φ = 399162.

The previous prime is 399151. The next prime is 399173. The reversal of 399163 is 361993.

It is a strong prime.

It is an emirp because it is prime and its reverse (361993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 399163 - 2⁵ = 399131 is a prime.

It is a super-2 number, since 2×399163² = 318662201138, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (399173) 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, 199581 + 199582.

It is an arithmetic number, because the mean of its divisors is an integer number (199582).

2³⁹⁹¹⁶³ is an apocalyptic number.

399163 is a deficient number, since it is larger than the sum of its proper divisors (1).

399163 is an equidigital number, since it uses as much as digits as its factorization.

399163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4374, while the sum is 31.

The square root of 399163 is about 631.7934789154. The cubic root of 399163 is about 73.6292018456.

The spelling of 399163 in words is "three hundred ninety-nine thousand, one hundred sixty-three".