198813611 has 2 divisors, whose sum is σ = 198813612. Its totient is φ = 198813610.

The previous prime is 198813607. The next prime is 198813613. The reversal of 198813611 is 116318891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 198813611 - 2² = 198813607 is a prime.

Together with 198813613, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (198813613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99406805 + 99406806.

It is an arithmetic number, because the mean of its divisors is an integer number (99406806).

Almost surely, 2^198813611 is an apocalyptic number.

198813611 is a deficient number, since it is larger than the sum of its proper divisors (1).

198813611 is an equidigital number, since it uses as much as digits as its factorization.

198813611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 38.

The square root of 198813611 is about 14100.1280490640. The cubic root of 198813611 is about 583.6449128007.

The spelling of 198813611 in words is "one hundred ninety-eight million, eight hundred thirteen thousand, six hundred eleven".