195949 has 4 divisors (see below), whose sum is σ = 211036. Its totient is φ = 180864.

The previous prime is 195931. The next prime is 195967. The reversal of 195949 is 949591.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 949591 = 67 ⋅14173.

It is an interprime number because it is at equal distance from previous prime (195931) and next prime (195967).

It can be written as a sum of positive squares in 2 ways, for example, as 59049 + 136900 = 243^2 + 370^2 .

It is a cyclic number.

It is not a de Polignac number, because 195949 - 2¹⁵ = 163181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7524 + ... + 7549.

It is an arithmetic number, because the mean of its divisors is an integer number (52759).

2¹⁹⁵⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

195949 is a deficient number, since it is larger than the sum of its proper divisors (15087).

195949 is a wasteful number, since it uses less digits than its factorization.

195949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15086.

The product of its digits is 14580, while the sum is 37.

The square root of 195949 is about 442.6612700474. The cubic root of 195949 is about 58.0828186661.

The spelling of 195949 in words is "one hundred ninety-five thousand, nine hundred forty-nine".