197918 has 16 divisors (see below), whose sum is σ = 345984. Its totient is φ = 83160.

The previous prime is 197909. The next prime is 197921. The reversal of 197918 is 819791.

It is a nialpdrome in base 12.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 197918.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 833 + ... + 1043.

It is an arithmetic number, because the mean of its divisors is an integer number (21624).

2¹⁹⁷⁹¹⁸ is an apocalyptic number.

197918 is a deficient number, since it is larger than the sum of its proper divisors (148066).

197918 is a wasteful number, since it uses less digits than its factorization.

197918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287.

The product of its digits is 4536, while the sum is 35.

The square root of 197918 is about 444.8797590361. The cubic root of 197918 is about 58.2767196763.

The spelling of 197918 in words is "one hundred ninety-seven thousand, nine hundred eighteen".