197442593 has 4 divisors (see below), whose sum is σ = 202258308. Its totient is φ = 192626880.

The previous prime is 197442559. The next prime is 197442611. The reversal of 197442593 is 395244791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 395244791 = 109 ⋅3626099.

It can be written as a sum of positive squares in 2 ways, for example, as 27583504 + 169859089 = 5252^2 + 13033^2 .

It is a cyclic number.

It is not a de Polignac number, because 197442593 - 2¹² = 197438497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197442293) 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, 2407796 + ... + 2407877.

It is an arithmetic number, because the mean of its divisors is an integer number (50564577).

Almost surely, 2^197442593 is an apocalyptic number.

It is an amenable number.

197442593 is a deficient number, since it is larger than the sum of its proper divisors (4815715).

197442593 is an equidigital number, since it uses as much as digits as its factorization.

197442593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4815714.

The product of its digits is 272160, while the sum is 44.

The square root of 197442593 is about 14051.4267247138. The cubic root of 197442593 is about 582.3002125725.

The spelling of 197442593 in words is "one hundred ninety-seven million, four hundred forty-two thousand, five hundred ninety-three".