198696961 has 4 divisors (see below), whose sum is σ = 200261632. Its totient is φ = 197132292.

The previous prime is 198696943. The next prime is 198696989. The reversal of 198696961 is 169696891.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 198696961 - 2¹³ = 198688769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198696161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 782145 + ... + 782398.

It is an arithmetic number, because the mean of its divisors is an integer number (50065408).

Almost surely, 2^198696961 is an apocalyptic number.

It is an amenable number.

198696961 is a deficient number, since it is larger than the sum of its proper divisors (1564671).

198696961 is a wasteful number, since it uses less digits than its factorization.

198696961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564670.

The product of its digits is 1259712, while the sum is 55.

The square root of 198696961 is about 14095.9909548779. The cubic root of 198696961 is about 583.5307430542.

The spelling of 198696961 in words is "one hundred ninety-eight million, six hundred ninety-six thousand, nine hundred sixty-one".