197656 has 16 divisors (see below), whose sum is σ = 383040. Its totient is φ = 95520.

The previous prime is 197651. The next prime is 197677. The reversal of 197656 is 656791.

It is an Ulam number.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197651) by changing a digit.

197656 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151 + ... + 646.

It is an arithmetic number, because the mean of its divisors is an integer number (23940).

2¹⁹⁷⁶⁵⁶ is an apocalyptic number.

It is an amenable number.

197656 is a deficient number, since it is larger than the sum of its proper divisors (185384).

197656 is a wasteful number, since it uses less digits than its factorization.

197656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 834 (or 830 counting only the distinct ones).

The product of its digits is 11340, while the sum is 34.

The square root of 197656 is about 444.5851999336. The cubic root of 197656 is about 58.2509931247.

The spelling of 197656 in words is "one hundred ninety-seven thousand, six hundred fifty-six".