197642173 has 4 divisors (see below), whose sum is σ = 200023488. Its totient is φ = 195260860.

The previous prime is 197642149. The next prime is 197642177. The reversal of 197642173 is 371246791.

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, and also an emirpimes, since its reverse is a distinct semiprime: 371246791 = 1699 ⋅218509.

It is a cyclic number.

It is not a de Polignac number, because 197642173 - 2¹⁷ = 197511101 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 (197642177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1190533 + ... + 1190698.

It is an arithmetic number, because the mean of its divisors is an integer number (50005872).

Almost surely, 2^197642173 is an apocalyptic number.

It is an amenable number.

197642173 is a deficient number, since it is larger than the sum of its proper divisors (2381315).

197642173 is an equidigital number, since it uses as much as digits as its factorization.

197642173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2381314.

The product of its digits is 63504, while the sum is 40.

The square root of 197642173 is about 14058.5267009029. The cubic root of 197642173 is about 582.4963477946.

The spelling of 197642173 in words is "one hundred ninety-seven million, six hundred forty-two thousand, one hundred seventy-three".