198244727 has 4 divisors (see below), whose sum is σ = 208678680. Its totient is φ = 187810776.

The previous prime is 198244723. The next prime is 198244747. The reversal of 198244727 is 727442891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 727442891 = 7 ⋅103920413.

It is a cyclic number.

It is not a de Polignac number, because 198244727 - 2² = 198244723 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198244723) 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, 5216948 + ... + 5216985.

It is an arithmetic number, because the mean of its divisors is an integer number (52169670).

Almost surely, 2^198244727 is an apocalyptic number.

198244727 is a deficient number, since it is larger than the sum of its proper divisors (10433953).

198244727 is a wasteful number, since it uses less digits than its factorization.

198244727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10433952.

The product of its digits is 225792, while the sum is 44.

The square root of 198244727 is about 14079.9405893633. The cubic root of 198244727 is about 583.0877017171.

The spelling of 198244727 in words is "one hundred ninety-eight million, two hundred forty-four thousand, seven hundred twenty-seven".