198486689 has 2 divisors, whose sum is σ = 198486690. Its totient is φ = 198486688.

The previous prime is 198486637. The next prime is 198486703. The reversal of 198486689 is 986684891.

198486689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 192987664 + 5499025 = 13892^2 + 2345^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198486689 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (198086689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99243344 + 99243345.

It is an arithmetic number, because the mean of its divisors is an integer number (99243345).

Almost surely, 2^198486689 is an apocalyptic number.

It is an amenable number.

198486689 is a deficient number, since it is larger than the sum of its proper divisors (1).

198486689 is an equidigital number, since it uses as much as digits as its factorization.

198486689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5971968, while the sum is 59.

The square root of 198486689 is about 14088.5304059721. The cubic root of 198486689 is about 583.3248290098.

The spelling of 198486689 in words is "one hundred ninety-eight million, four hundred eighty-six thousand, six hundred eighty-nine".