197975018 has 8 divisors (see below), whose sum is σ = 297388260. Its totient is φ = 98845600.

The previous prime is 197974999. The next prime is 197975023. The reversal of 197975018 is 810579791.

It can be written as a sum of positive squares in 2 ways, for example, as 197599249 + 375769 = 14057^2 + 613^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69203 + ... + 72006.

Almost surely, 2^197975018 is an apocalyptic number.

197975018 is a deficient number, since it is larger than the sum of its proper divisors (99413242).

197975018 is a wasteful number, since it uses less digits than its factorization.

197975018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141912.

The product of its (nonzero) digits is 158760, while the sum is 47.

The square root of 197975018 is about 14070.3595547520. The cubic root of 197975018 is about 582.8231543304.

The spelling of 197975018 in words is "one hundred ninety-seven million, nine hundred seventy-five thousand, eighteen".