197812 has 12 divisors (see below), whose sum is σ = 366660. Its totient is φ = 93056.

The previous prime is 197807. The next prime is 197831. The reversal of 197812 is 218791.

197812 is nontrivially palindromic in base 3.

It can be written as a sum of positive squares in 2 ways, for example, as 163216 + 34596 = 404^2 + 186^2 .

It is a plaindrome in base 11.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1387 + ... + 1522.

It is an arithmetic number, because the mean of its divisors is an integer number (30555).

2¹⁹⁷⁸¹² is an apocalyptic number.

It is an amenable number.

197812 is a deficient number, since it is larger than the sum of its proper divisors (168848).

197812 is a wasteful number, since it uses less digits than its factorization.

197812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2930 (or 2928 counting only the distinct ones).

The product of its digits is 1008, while the sum is 28.

The square root of 197812 is about 444.7606097666. The cubic root of 197812 is about 58.2663139604.

The spelling of 197812 in words is "one hundred ninety-seven thousand, eight hundred twelve".