197572873917 has 4 divisors (see below), whose sum is σ = 263430498560. Its totient is φ = 131715249276.

The previous prime is 197572873913. The next prime is 197572873987. The reversal of 197572873917 is 719378275791.

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 not a de Polignac number, because 197572873917 - 2² = 197572873913 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 (197572873913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32928812317 + ... + 32928812322.

It is an arithmetic number, because the mean of its divisors is an integer number (65857624640).

Almost surely, 2^197572873917 is an apocalyptic number.

It is an amenable number.

197572873917 is a deficient number, since it is larger than the sum of its proper divisors (65857624643).

197572873917 is an equidigital number, since it uses as much as digits as its factorization.

197572873917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65857624642.

The product of its digits is 46675440, while the sum is 66.

The spelling of 197572873917 in words is "one hundred ninety-seven billion, five hundred seventy-two million, eight hundred seventy-three thousand, nine hundred seventeen".