197531850073 has 4 divisors (see below), whose sum is σ = 197532759780. Its totient is φ = 197530940368.

The previous prime is 197531850071. The next prime is 197531850077. The reversal of 197531850073 is 370058135791.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 172783211584 + 24748638489 = 415672^2 + 157317^2 .

It is a cyclic number.

It is not a de Polignac number, because 197531850073 - 2¹ = 197531850071 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 197531849999 and 197531850026.

It is not an unprimeable number, because it can be changed into a prime (197531850071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82311 + ... + 633907.

It is an arithmetic number, because the mean of its divisors is an integer number (49383189945).

Almost surely, 2^197531850073 is an apocalyptic number.

It is an amenable number.

197531850073 is a deficient number, since it is larger than the sum of its proper divisors (909707).

197531850073 is an equidigital number, since it uses as much as digits as its factorization.

197531850073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909706.

The product of its (nonzero) digits is 793800, while the sum is 49.

The spelling of 197531850073 in words is "one hundred ninety-seven billion, five hundred thirty-one million, eight hundred fifty thousand, seventy-three".