197288301921 has 16 divisors (see below), whose sum is σ = 266663255040. Its totient is φ = 129729618000.

The previous prime is 197288301871. The next prime is 197288301937. The reversal of 197288301921 is 129103882791.

It is not a de Polignac number, because 197288301921 - 2²⁵ = 197254747489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (197288301971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1194301 + ... + 1349418.

It is an arithmetic number, because the mean of its divisors is an integer number (16666453440).

Almost surely, 2^197288301921 is an apocalyptic number.

It is an amenable number.

197288301921 is a deficient number, since it is larger than the sum of its proper divisors (69374953119).

197288301921 is a wasteful number, since it uses less digits than its factorization.

197288301921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2544076.

The product of its (nonzero) digits is 435456, while the sum is 51.

The spelling of 197288301921 in words is "one hundred ninety-seven billion, two hundred eighty-eight million, three hundred one thousand, nine hundred twenty-one".