198670689 has 24 divisors (see below), whose sum is σ = 328366272. Its totient is φ = 113387040.

The previous prime is 198670639. The next prime is 198670697. The reversal of 198670689 is 986076891.

It is not a de Polignac number, because 198670689 - 2¹⁶ = 198605153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198670609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 72427 + ... + 75119.

It is an arithmetic number, because the mean of its divisors is an integer number (13681928).

Almost surely, 2^198670689 is an apocalyptic number.

It is an amenable number.

198670689 is a deficient number, since it is larger than the sum of its proper divisors (129695583).

198670689 is a wasteful number, since it uses less digits than its factorization.

198670689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3877 (or 3874 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The square root of 198670689 is about 14095.0590279005. The cubic root of 198670689 is about 583.5050234939.

The spelling of 198670689 in words is "one hundred ninety-eight million, six hundred seventy thousand, six hundred eighty-nine".