398659563 has 20 divisors (see below), whose sum is σ = 596118600. Its totient is φ = 265509792.

The previous prime is 398659531. The next prime is 398659589. The reversal of 398659563 is 365956893.

It is not a de Polignac number, because 398659563 - 2⁵ = 398659531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (398659763) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 113863 + ... + 117311.

It is an arithmetic number, because the mean of its divisors is an integer number (29805930).

Almost surely, 2^398659563 is an apocalyptic number.

398659563 is a deficient number, since it is larger than the sum of its proper divisors (197459037).

398659563 is a wasteful number, since it uses less digits than its factorization.

398659563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4888 (or 4879 counting only the distinct ones).

The product of its digits is 5248800, while the sum is 54.

The square root of 398659563 is about 19966.4609533087. The cubic root of 398659563 is about 735.9823433018.

The spelling of 398659563 in words is "three hundred ninety-eight million, six hundred fifty-nine thousand, five hundred sixty-three".