198727747 has 2 divisors, whose sum is σ = 198727748. Its totient is φ = 198727746.

The previous prime is 198727741. The next prime is 198727757. The reversal of 198727747 is 747727891.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 198727747 - 2⁷ = 198727619 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 198727694 and 198727703.

It is not a weakly prime, because it can be changed into another prime (198727741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99363873 + 99363874.

It is an arithmetic number, because the mean of its divisors is an integer number (99363874).

Almost surely, 2^198727747 is an apocalyptic number.

198727747 is a deficient number, since it is larger than the sum of its proper divisors (1).

198727747 is an equidigital number, since it uses as much as digits as its factorization.

198727747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1382976, while the sum is 52.

The square root of 198727747 is about 14097.0829252012. The cubic root of 198727747 is about 583.5608788107.

The spelling of 198727747 in words is "one hundred ninety-eight million, seven hundred twenty-seven thousand, seven hundred forty-seven".