198241979 has 4 divisors (see below), whose sum is σ = 213491376. Its totient is φ = 182992584.

The previous prime is 198241957. The next prime is 198241987. The reversal of 198241979 is 979142891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 979142891 = 67 ⋅14614073.

It is a cyclic number.

It is not a de Polignac number, because 198241979 - 2¹² = 198237883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198241909) 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, 7624679 + ... + 7624704.

It is an arithmetic number, because the mean of its divisors is an integer number (53372844).

Almost surely, 2^198241979 is an apocalyptic number.

198241979 is a deficient number, since it is larger than the sum of its proper divisors (15249397).

198241979 is a wasteful number, since it uses less digits than its factorization.

198241979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15249396.

The product of its digits is 326592, while the sum is 50.

The square root of 198241979 is about 14079.8430033861. The cubic root of 198241979 is about 583.0850075178.

The spelling of 198241979 in words is "one hundred ninety-eight million, two hundred forty-one thousand, nine hundred seventy-nine".