197685 has 24 divisors (see below), whose sum is σ = 359424. Its totient is φ = 100320.

The previous prime is 197683. The next prime is 197689. The reversal of 197685 is 586791.

It is not a de Polignac number, because 197685 - 2¹ = 197683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 940 + ... + 1130.

It is an arithmetic number, because the mean of its divisors is an integer number (14976).

2¹⁹⁷⁶⁸⁵ is an apocalyptic number.

197685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

197685 is a deficient number, since it is larger than the sum of its proper divisors (161739).

197685 is a wasteful number, since it uses less digits than its factorization.

197685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225 (or 222 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 197685 is about 444.6178134083. The cubic root of 197685 is about 58.2538418386.

The spelling of 197685 in words is "one hundred ninety-seven thousand, six hundred eighty-five".