197143574813 has 4 divisors (see below), whose sum is σ = 197241317820. Its totient is φ = 197045831808.

The previous prime is 197143574731. The next prime is 197143574843. The reversal of 197143574813 is 318475341791.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 161235977764 + 35907597049 = 401542^2 + 189493^2 .

It is a cyclic number.

It is not a de Polignac number, because 197143574813 - 2²⁰ = 197142526237 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 (197143574843) 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, 48868478 + ... + 48872511.

It is an arithmetic number, because the mean of its divisors is an integer number (49310329455).

Almost surely, 2^197143574813 is an apocalyptic number.

It is an amenable number.

197143574813 is a deficient number, since it is larger than the sum of its proper divisors (97743007).

197143574813 is an equidigital number, since it uses as much as digits as its factorization.

197143574813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97743006.

The product of its digits is 2540160, while the sum is 53.

The spelling of 197143574813 in words is "one hundred ninety-seven billion, one hundred forty-three million, five hundred seventy-four thousand, eight hundred thirteen".