198971119 has 4 divisors (see below), whose sum is σ = 199021144. Its totient is φ = 198921096.

The previous prime is 198971057. The next prime is 198971141. The reversal of 198971119 is 911179891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 911179891 = 23 ⋅39616517.

It is a cyclic number.

It is not a de Polignac number, because 198971119 - 2²¹ = 196873967 is a prime.

It is a super-2 number, since 2×198971119² = 79179012392224322, 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 (198971189) 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, 18477 + ... + 27190.

It is an arithmetic number, because the mean of its divisors is an integer number (49755286).

Almost surely, 2^198971119 is an apocalyptic number.

198971119 is a deficient number, since it is larger than the sum of its proper divisors (50025).

198971119 is an equidigital number, since it uses as much as digits as its factorization.

198971119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50024.

The product of its digits is 40824, while the sum is 46.

The square root of 198971119 is about 14105.7122826180. The cubic root of 198971119 is about 583.7990009717.

The spelling of 198971119 in words is "one hundred ninety-eight million, nine hundred seventy-one thousand, one hundred nineteen".