198136897 has 8 divisors (see below), whose sum is σ = 226529600. Its totient is φ = 169766064.

The previous prime is 198136859. The next prime is 198136901. The reversal of 198136897 is 798631891.

It is a happy number.

198136897 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-198136897 is a prime.

It is a super-3 number, since 3×198136897³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198136817) 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, 26179 + ... + 32887.

It is an arithmetic number, because the mean of its divisors is an integer number (28316200).

Almost surely, 2^198136897 is an apocalyptic number.

It is an amenable number.

198136897 is a deficient number, since it is larger than the sum of its proper divisors (28392703).

198136897 is an equidigital number, since it uses as much as digits as its factorization.

198136897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10935.

The product of its digits is 653184, while the sum is 52.

The square root of 198136897 is about 14076.1108620244. The cubic root of 198136897 is about 582.9819641423.

The spelling of 198136897 in words is "one hundred ninety-eight million, one hundred thirty-six thousand, eight hundred ninety-seven".