195669 has 8 divisors (see below), whose sum is σ = 289920. Its totient is φ = 130428.

The previous prime is 195659. The next prime is 195677. The reversal of 195669 is 966591.

It is not a de Polignac number, because 195669 - 2⁷ = 195541 is a prime.

It is a super-2 number, since 2×195669² = 76572715122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3597 + ... + 3650.

It is an arithmetic number, because the mean of its divisors is an integer number (36240).

2¹⁹⁵⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

195669 is a deficient number, since it is larger than the sum of its proper divisors (94251).

195669 is an equidigital number, since it uses as much as digits as its factorization.

195669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7256 (or 7250 counting only the distinct ones).

The product of its digits is 14580, while the sum is 36.

The square root of 195669 is about 442.3448880681. The cubic root of 195669 is about 58.0551397942.

It can be divided in two parts, 1956 and 69, that added together give a square (2025 = 45²).

The spelling of 195669 in words is "one hundred ninety-five thousand, six hundred sixty-nine".