197849 has 4 divisors (see below), whose sum is σ = 201636. Its totient is φ = 194064.

The previous prime is 197837. The next prime is 197887. The reversal of 197849 is 948791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 948791 = 37 ⋅25643.

It can be written as a sum of positive squares in 2 ways, for example, as 126025 + 71824 = 355^2 + 268^2 .

It is a cyclic number.

It is not a de Polignac number, because 197849 - 2¹⁶ = 132313 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1814 + ... + 1919.

It is an arithmetic number, because the mean of its divisors is an integer number (50409).

2¹⁹⁷⁸⁴⁹ is an apocalyptic number.

It is an amenable number.

197849 is a deficient number, since it is larger than the sum of its proper divisors (3787).

197849 is an equidigital number, since it uses as much as digits as its factorization.

197849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3786.

The product of its digits is 18144, while the sum is 38.

The square root of 197849 is about 444.8022032320. The cubic root of 197849 is about 58.2699465665.

The spelling of 197849 in words is "one hundred ninety-seven thousand, eight hundred forty-nine".