197270857 has 4 divisors (see below), whose sum is σ = 225452416. Its totient is φ = 169089300.

The previous prime is 197270849. The next prime is 197270861. The reversal of 197270857 is 758072791.

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.

It is a cyclic number.

It is not a de Polignac number, because 197270857 - 2³ = 197270849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (197270867) 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 3 ways as a sum of consecutive naturals, for example, 14090769 + ... + 14090782.

It is an arithmetic number, because the mean of its divisors is an integer number (56363104).

Almost surely, 2^197270857 is an apocalyptic number.

It is an amenable number.

197270857 is a deficient number, since it is larger than the sum of its proper divisors (28181559).

197270857 is an equidigital number, since it uses as much as digits as its factorization.

197270857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28181558.

The product of its (nonzero) digits is 246960, while the sum is 46.

The square root of 197270857 is about 14045.3144144231. The cubic root of 197270857 is about 582.1313349327.

The spelling of 197270857 in words is "one hundred ninety-seven million, two hundred seventy thousand, eight hundred fifty-seven".