198964897 has 8 divisors (see below), whose sum is σ = 201977600. Its totient is φ = 195964704.

The previous prime is 198964867. The next prime is 198964919. The reversal of 198964897 is 798469891.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198964897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198964807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31813 + ... + 37549.

It is an arithmetic number, because the mean of its divisors is an integer number (25247200).

Almost surely, 2^198964897 is an apocalyptic number.

It is an amenable number.

198964897 is a deficient number, since it is larger than the sum of its proper divisors (3012703).

198964897 is an equidigital number, since it uses as much as digits as its factorization.

198964897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6255.

The product of its digits is 7838208, while the sum is 61.

The square root of 198964897 is about 14105.4917319461. The cubic root of 198964897 is about 583.7929156074.

The spelling of 198964897 in words is "one hundred ninety-eight million, nine hundred sixty-four thousand, eight hundred ninety-seven".