198922949 has 2 divisors, whose sum is σ = 198922950. Its totient is φ = 198922948.

The previous prime is 198922931. The next prime is 198922957. The reversal of 198922949 is 949229891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196420225 + 2502724 = 14015^2 + 1582^2 .

It is an emirp because it is prime and its reverse (949229891) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198922949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 198922949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198922909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99461474 + 99461475.

It is an arithmetic number, because the mean of its divisors is an integer number (99461475).

Almost surely, 2^198922949 is an apocalyptic number.

It is an amenable number.

198922949 is a deficient number, since it is larger than the sum of its proper divisors (1).

198922949 is an equidigital number, since it uses as much as digits as its factorization.

198922949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 839808, while the sum is 53.

The square root of 198922949 is about 14104.0047149737. The cubic root of 198922949 is about 583.7518854780.

The spelling of 198922949 in words is "one hundred ninety-eight million, nine hundred twenty-two thousand, nine hundred forty-nine".