198000641 has 4 divisors (see below), whose sum is σ = 198030000. Its totient is φ = 197971284.

The previous prime is 198000619. The next prime is 198000697. The reversal of 198000641 is 146000891.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198000641 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (198000541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1070 + ... + 19928.

It is an arithmetic number, because the mean of its divisors is an integer number (49507500).

It is a Proth number, since it is equal to 12085 ⋅ 2¹⁴ + 1 and 12085 < 2¹⁴.

Almost surely, 2^198000641 is an apocalyptic number.

It is an amenable number.

198000641 is a deficient number, since it is larger than the sum of its proper divisors (29359).

198000641 is a wasteful number, since it uses less digits than its factorization.

198000641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29358.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 198000641 is about 14071.2700563951. The cubic root of 198000641 is about 582.8482972897.

The spelling of 198000641 in words is "one hundred ninety-eight million, six hundred forty-one", and thus it is an aban number.