197485561 has 24 divisors (see below), whose sum is σ = 249324992. Its totient is φ = 152323200.

The previous prime is 197485553. The next prime is 197485591. The reversal of 197485561 is 165584791.

It is not a de Polignac number, because 197485561 - 2³ = 197485553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (197485511) 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 23 ways as a sum of consecutive naturals, for example, 152326 + ... + 153616.

Almost surely, 2^197485561 is an apocalyptic number.

It is an amenable number.

197485561 is a deficient number, since it is larger than the sum of its proper divisors (51839431).

197485561 is a wasteful number, since it uses less digits than its factorization.

197485561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1393 (or 1352 counting only the distinct ones).

The product of its digits is 302400, while the sum is 46.

The square root of 197485561 is about 14052.9555965996. The cubic root of 197485561 is about 582.3424500998.

The spelling of 197485561 in words is "one hundred ninety-seven million, four hundred eighty-five thousand, five hundred sixty-one".