198057827 has 4 divisors (see below), whose sum is σ = 216063096. Its totient is φ = 180052560.

The previous prime is 198057817. The next prime is 198057851. The reversal of 198057827 is 728750891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 728750891 = 11 ⋅66250081.

It is a cyclic number.

It is not a de Polignac number, because 198057827 - 2²⁰ = 197009251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198057817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9002618 + ... + 9002639.

It is an arithmetic number, because the mean of its divisors is an integer number (54015774).

Almost surely, 2^198057827 is an apocalyptic number.

198057827 is a deficient number, since it is larger than the sum of its proper divisors (18005269).

198057827 is a wasteful number, since it uses less digits than its factorization.

198057827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18005268.

The product of its (nonzero) digits is 282240, while the sum is 47.

The square root of 198057827 is about 14073.3019224345. The cubic root of 198057827 is about 582.9044041020.

The spelling of 198057827 in words is "one hundred ninety-eight million, fifty-seven thousand, eight hundred twenty-seven".