197066137 has 4 divisors (see below), whose sum is σ = 200784420. Its totient is φ = 193347856.

The previous prime is 197066123. The next prime is 197066141. The reversal of 197066137 is 731660791.

It is a happy number.

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 178195801 + 18870336 = 13349^2 + 4344^2 .

It is a cyclic number.

It is not a de Polignac number, because 197066137 - 2¹¹ = 197064089 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 197066137.

It is not an unprimeable number, because it can be changed into a prime (197066117) 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, 1859062 + ... + 1859167.

It is an arithmetic number, because the mean of its divisors is an integer number (50196105).

Almost surely, 2^197066137 is an apocalyptic number.

It is an amenable number.

197066137 is a deficient number, since it is larger than the sum of its proper divisors (3718283).

197066137 is an equidigital number, since it uses as much as digits as its factorization.

197066137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3718282.

The product of its (nonzero) digits is 47628, while the sum is 40.

The square root of 197066137 is about 14038.0246829816. The cubic root of 197066137 is about 581.9298941705.

The spelling of 197066137 in words is "one hundred ninety-seven million, sixty-six thousand, one hundred thirty-seven".