398889063863 has 2 divisors, whose sum is σ = 398889063864. Its totient is φ = 398889063862.

The previous prime is 398889063847. The next prime is 398889063887. The reversal of 398889063863 is 368360988893.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 398889063863 - 2⁴ = 398889063847 is a prime.

It is a super-2 number, since 2×398889063863² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398889069863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199444531931 + 199444531932.

It is an arithmetic number, because the mean of its divisors is an integer number (199444531932).

Almost surely, 2^398889063863 is an apocalyptic number.

398889063863 is a deficient number, since it is larger than the sum of its proper divisors (1).

398889063863 is an equidigital number, since it uses as much as digits as its factorization.

398889063863 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 322486272, while the sum is 71.

The spelling of 398889063863 in words is "three hundred ninety-eight billion, eight hundred eighty-nine million, sixty-three thousand, eight hundred sixty-three".