198969775 has 6 divisors (see below), whose sum is σ = 246722552. Its totient is φ = 159175800.

The previous prime is 198969773. The next prime is 198969779. The reversal of 198969775 is 577969891.

It is not a de Polignac number, because 198969775 - 2¹ = 198969773 is a prime.

It is a super-3 number, since 3×198969775³ (a number of 26 digits) contains 333 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 (198969773) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3979371 + ... + 3979420.

Almost surely, 2^198969775 is an apocalyptic number.

198969775 is a deficient number, since it is larger than the sum of its proper divisors (47752777).

198969775 is an equidigital number, since it uses as much as digits as its factorization.

198969775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7958801 (or 7958796 counting only the distinct ones).

The product of its digits is 8573040, while the sum is 61.

The square root of 198969775 is about 14105.6646422634. The cubic root of 198969775 is about 583.7976864968.

The spelling of 198969775 in words is "one hundred ninety-eight million, nine hundred sixty-nine thousand, seven hundred seventy-five".