197959 has 2 divisors, whose sum is σ = 197960. Its totient is φ = 197958.

The previous prime is 197957. The next prime is 197963. The reversal of 197959 is 959791.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 197959 - 2¹ = 197957 is a prime.

Together with 197957, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98979 + 98980.

It is an arithmetic number, because the mean of its divisors is an integer number (98980).

2¹⁹⁷⁹⁵⁹ is an apocalyptic number.

197959 is a deficient number, since it is larger than the sum of its proper divisors (1).

197959 is an equidigital number, since it uses as much as digits as its factorization.

197959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25515, while the sum is 40.

The square root of 197959 is about 444.9258365166. The cubic root of 197959 is about 58.2807435322.

It can be divided in two parts, 197 and 959, that added together give a square (1156 = 34²).

The spelling of 197959 in words is "one hundred ninety-seven thousand, nine hundred fifty-nine".