197686061 has 4 divisors (see below), whose sum is σ = 197943900. Its totient is φ = 197428224.

The previous prime is 197686057. The next prime is 197686067. The reversal of 197686061 is 160686791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 160686791 = 113 ⋅1422007.

It can be written as a sum of positive squares in 2 ways, for example, as 22944100 + 174741961 = 4790^2 + 13219^2 .

It is a cyclic number.

It is not a de Polignac number, because 197686061 - 2² = 197686057 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 (197686067) 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, 127766 + ... + 129303.

It is an arithmetic number, because the mean of its divisors is an integer number (49485975).

Almost surely, 2^197686061 is an apocalyptic number.

It is an amenable number.

197686061 is a deficient number, since it is larger than the sum of its proper divisors (257839).

197686061 is an equidigital number, since it uses as much as digits as its factorization.

197686061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257838.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 197686061 is about 14060.0875175086. The cubic root of 197686061 is about 582.5394605698.

The spelling of 197686061 in words is "one hundred ninety-seven million, six hundred eighty-six thousand, sixty-one".