197110561 has 4 divisors (see below), whose sum is σ = 197560000. Its totient is φ = 196661124.

The previous prime is 197110559. The next prime is 197110577. The reversal of 197110561 is 165011791.

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 a cyclic number.

It is not a de Polignac number, because 197110561 - 2¹ = 197110559 is a prime.

It is a super-3 number, since 3×197110561³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197110261) 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, 224061 + ... + 224938.

It is an arithmetic number, because the mean of its divisors is an integer number (49390000).

Almost surely, 2^197110561 is an apocalyptic number.

It is an amenable number.

197110561 is a deficient number, since it is larger than the sum of its proper divisors (449439).

197110561 is an equidigital number, since it uses as much as digits as its factorization.

197110561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449438.

The product of its (nonzero) digits is 1890, while the sum is 31.

The square root of 197110561 is about 14039.6068677153. The cubic root of 197110561 is about 581.9736184276.

The spelling of 197110561 in words is "one hundred ninety-seven million, one hundred ten thousand, five hundred sixty-one".