197272861 has 8 divisors (see below), whose sum is σ = 202305600. Its totient is φ = 192302880.

The previous prime is 197272843. The next prime is 197272883. The reversal of 197272861 is 168272791.

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 197272861 - 2¹⁵ = 197240093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197272661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9291 + ... + 21928.

It is an arithmetic number, because the mean of its divisors is an integer number (25288200).

Almost surely, 2^197272861 is an apocalyptic number.

It is an amenable number.

197272861 is a deficient number, since it is larger than the sum of its proper divisors (5032739).

197272861 is an equidigital number, since it uses as much as digits as its factorization.

197272861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31379.

The product of its digits is 84672, while the sum is 43.

The square root of 197272861 is about 14045.3857547595. The cubic root of 197272861 is about 582.1333061433.

The spelling of 197272861 in words is "one hundred ninety-seven million, two hundred seventy-two thousand, eight hundred sixty-one".