197168845 has 4 divisors (see below), whose sum is σ = 236602620. Its totient is φ = 157735072.

The previous prime is 197168843. The next prime is 197168863. The reversal of 197168845 is 548861791.

197168845 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 548861791 = 3917 ⋅140123.

It can be written as a sum of positive squares in 2 ways, for example, as 105124009 + 92044836 = 10253^2 + 9594^2 .

It is a cyclic number.

It is not a de Polignac number, because 197168845 - 2¹ = 197168843 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197168843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19716880 + ... + 19716889.

It is an arithmetic number, because the mean of its divisors is an integer number (59150655).

Almost surely, 2^197168845 is an apocalyptic number.

It is an amenable number.

197168845 is a deficient number, since it is larger than the sum of its proper divisors (39433775).

197168845 is an equidigital number, since it uses as much as digits as its factorization.

197168845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39433774.

The product of its digits is 483840, while the sum is 49.

The square root of 197168845 is about 14041.6824134432. The cubic root of 197168845 is about 582.0309744067.

It can be divided in two parts, 19716 and 8845, that added together give a 4-th power (28561 = 13⁴).

The spelling of 197168845 in words is "one hundred ninety-seven million, one hundred sixty-eight thousand, eight hundred forty-five".