197998843 has 8 divisors (see below), whose sum is σ = 226437120. Its totient is φ = 169598760.

The previous prime is 197998819. The next prime is 197998859. The reversal of 197998843 is 348899791.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 197998843 - 2⁵ = 197998811 is a prime.

It is not an unprimeable number, because it can be changed into a prime (197998873) 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, 2598 + ... + 20068.

It is an arithmetic number, because the mean of its divisors is an integer number (28304640).

Almost surely, 2^197998843 is an apocalyptic number.

197998843 is a deficient number, since it is larger than the sum of its proper divisors (28438277).

197998843 is a wasteful number, since it uses less digits than its factorization.

197998843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19097.

The product of its digits is 3919104, while the sum is 58.

The square root of 197998843 is about 14071.2061672054. The cubic root of 197998843 is about 582.8465330456.

The spelling of 197998843 in words is "one hundred ninety-seven million, nine hundred ninety-eight thousand, eight hundred forty-three".