198696785 has 16 divisors (see below), whose sum is σ = 275149056. Its totient is φ = 134923968.

The previous prime is 198696769. The next prime is 198696787. The reversal of 198696785 is 587696891.

It is a cyclic number.

It is not a de Polignac number, because 198696785 - 2⁴ = 198696769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198696787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23954 + ... + 31163.

It is an arithmetic number, because the mean of its divisors is an integer number (17196816).

Almost surely, 2^198696785 is an apocalyptic number.

It is an amenable number.

198696785 is a deficient number, since it is larger than the sum of its proper divisors (76452271).

198696785 is a wasteful number, since it uses less digits than its factorization.

198696785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55232.

The product of its digits is 6531840, while the sum is 59.

The square root of 198696785 is about 14095.9847119667. The cubic root of 198696785 is about 583.5305707626.

The spelling of 198696785 in words is "one hundred ninety-eight million, six hundred ninety-six thousand, seven hundred eighty-five".