398863 has 2 divisors, whose sum is σ = 398864. Its totient is φ = 398862.

The previous prime is 398857. The next prime is 398887. The reversal of 398863 is 368893.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 398863 - 2¹³ = 390671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199431 + 199432.

It is an arithmetic number, because the mean of its divisors is an integer number (199432).

2³⁹⁸⁸⁶³ is an apocalyptic number.

398863 is a deficient number, since it is larger than the sum of its proper divisors (1).

398863 is an equidigital number, since it uses as much as digits as its factorization.

398863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 37.

The square root of 398863 is about 631.5560149345. The cubic root of 398863 is about 73.6107513240.

The spelling of 398863 in words is "three hundred ninety-eight thousand, eight hundred sixty-three".