198944969 has 2 divisors, whose sum is σ = 198944970. Its totient is φ = 198944968.

The previous prime is 198944957. The next prime is 198945013. The reversal of 198944969 is 969449891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108409744 + 90535225 = 10412^2 + 9515^2 .

It is an emirp because it is prime and its reverse (969449891) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198944969 is a prime.

It is a super-2 number, since 2×198944969² = 79158201380821922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (198944069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99472484 + 99472485.

It is an arithmetic number, because the mean of its divisors is an integer number (99472485).

Almost surely, 2^198944969 is an apocalyptic number.

It is an amenable number.

198944969 is a deficient number, since it is larger than the sum of its proper divisors (1).

198944969 is an equidigital number, since it uses as much as digits as its factorization.

198944969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5038848, while the sum is 59.

The square root of 198944969 is about 14104.7853227194. The cubic root of 198944969 is about 583.7734243742.

The spelling of 198944969 in words is "one hundred ninety-eight million, nine hundred forty-four thousand, nine hundred sixty-nine".