198986654 has 8 divisors (see below), whose sum is σ = 298861608. Its totient is φ = 99366120.

The previous prime is 198986633. The next prime is 198986657. The reversal of 198986654 is 456689891.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 198986654.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198986657) 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 3 ways as a sum of consecutive naturals, for example, 61637 + ... + 64784.

It is an arithmetic number, because the mean of its divisors is an integer number (37357701).

Almost surely, 2^198986654 is an apocalyptic number.

198986654 is a deficient number, since it is larger than the sum of its proper divisors (99874954).

198986654 is a wasteful number, since it uses less digits than its factorization.

198986654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127210.

The product of its digits is 3732480, while the sum is 56.

The square root of 198986654 is about 14106.2629353064. The cubic root of 198986654 is about 583.8141942680.

The spelling of 198986654 in words is "one hundred ninety-eight million, nine hundred eighty-six thousand, six hundred fifty-four".