198227947 has 2 divisors, whose sum is σ = 198227948. Its totient is φ = 198227946.

The previous prime is 198227933. The next prime is 198228029. The reversal of 198227947 is 749722891.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198227947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 198227947.

It is not a weakly prime, because it can be changed into another prime (198227917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99113973 + 99113974.

It is an arithmetic number, because the mean of its divisors is an integer number (99113974).

Almost surely, 2^198227947 is an apocalyptic number.

198227947 is a deficient number, since it is larger than the sum of its proper divisors (1).

198227947 is an equidigital number, since it uses as much as digits as its factorization.

198227947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 49.

The square root of 198227947 is about 14079.3446935573. The cubic root of 198227947 is about 583.0712498500.

It can be divided in two parts, 1982 and 27947, that added together give a square (29929 = 173²).

The spelling of 198227947 in words is "one hundred ninety-eight million, two hundred twenty-seven thousand, nine hundred forty-seven".