197618 has 4 divisors (see below), whose sum is σ = 296430. Its totient is φ = 98808.

The previous prime is 197609. The next prime is 197621. The reversal of 197618 is 816791.

197618 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 816791 = 19 ⋅42989.

It can be written as a sum of positive squares in only one way, i.e., 196249 + 1369 = 443^2 + 37^2 .

It is a nialpdrome in base 12.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 197618.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49403 + ... + 49406.

2¹⁹⁷⁶¹⁸ is an apocalyptic number.

197618 is a deficient number, since it is larger than the sum of its proper divisors (98812).

197618 is an equidigital number, since it uses as much as digits as its factorization.

197618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98811.

The product of its digits is 3024, while the sum is 32.

The square root of 197618 is about 444.5424614140. The cubic root of 197618 is about 58.2472599054.

The spelling of 197618 in words is "one hundred ninety-seven thousand, six hundred eighteen".