198358983 has 16 divisors (see below), whose sum is σ = 294235360. Its totient is φ = 132072768.

The previous prime is 198358939. The next prime is 198358991. The reversal of 198358983 is 389853891.

It is not a de Polignac number, because 198358983 - 2¹² = 198354887 is a prime.

It is a super-2 number, since 2×198358983² = 78692572273588578, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198351983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19491 + ... + 27867.

It is an arithmetic number, because the mean of its divisors is an integer number (18389710).

Almost surely, 2^198358983 is an apocalyptic number.

198358983 is a deficient number, since it is larger than the sum of its proper divisors (95876377).

198358983 is an equidigital number, since it uses as much as digits as its factorization.

198358983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9263 (or 9257 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 54.

The square root of 198358983 is about 14083.9974084065. The cubic root of 198358983 is about 583.1996987670.

The spelling of 198358983 in words is "one hundred ninety-eight million, three hundred fifty-eight thousand, nine hundred eighty-three".