198083257 has 4 divisors (see below), whose sum is σ = 200590720. Its totient is φ = 195575796.

The previous prime is 198083251. The next prime is 198083267. The reversal of 198083257 is 752380891.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 198083257 - 2¹⁹ = 197558969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198083251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1253613 + ... + 1253770.

It is an arithmetic number, because the mean of its divisors is an integer number (50147680).

Almost surely, 2^198083257 is an apocalyptic number.

It is an amenable number.

198083257 is a deficient number, since it is larger than the sum of its proper divisors (2507463).

198083257 is an equidigital number, since it uses as much as digits as its factorization.

198083257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2507462.

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 198083257 is about 14074.2053772140. The cubic root of 198083257 is about 582.9293507297.

The spelling of 198083257 in words is "one hundred ninety-eight million, eighty-three thousand, two hundred fifty-seven".