198492771 has 4 divisors (see below), whose sum is σ = 264657032. Its totient is φ = 132328512.

The previous prime is 198492769. The next prime is 198492779. The reversal of 198492771 is 177294891.

198492771 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 198492771 - 2¹ = 198492769 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 198492771.

It is not an unprimeable number, because it can be changed into a prime (198492779) 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, 33082126 + ... + 33082131.

It is an arithmetic number, because the mean of its divisors is an integer number (66164258).

Almost surely, 2^198492771 is an apocalyptic number.

198492771 is a deficient number, since it is larger than the sum of its proper divisors (66164261).

198492771 is an equidigital number, since it uses as much as digits as its factorization.

198492771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66164260.

The product of its digits is 254016, while the sum is 48.

The square root of 198492771 is about 14088.7462536593. The cubic root of 198492771 is about 583.3307870002.

The spelling of 198492771 in words is "one hundred ninety-eight million, four hundred ninety-two thousand, seven hundred seventy-one".