195943669 has 4 divisors (see below), whose sum is σ = 195996780. Its totient is φ = 195890560.

The previous prime is 195943663. The next prime is 195943681. The reversal of 195943669 is 966349591.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 966349591 = 1553 ⋅622247.

It can be written as a sum of positive squares in 2 ways, for example, as 45562500 + 150381169 = 6750^2 + 12263^2 .

It is a cyclic number.

It is not a de Polignac number, because 195943669 - 2¹¹ = 195941621 is a prime.

It is a super-2 number, since 2×195943669² = 76787842842363122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195943663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20572 + ... + 28549.

It is an arithmetic number, because the mean of its divisors is an integer number (48999195).

Almost surely, 2^195943669 is an apocalyptic number.

It is an amenable number.

195943669 is a deficient number, since it is larger than the sum of its proper divisors (53111).

195943669 is an equidigital number, since it uses as much as digits as its factorization.

195943669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53110.

The product of its digits is 1574640, while the sum is 52.

The square root of 195943669 is about 13997.9880339997. The cubic root of 195943669 is about 580.8229192643.

The spelling of 195943669 in words is "one hundred ninety-five million, nine hundred forty-three thousand, six hundred sixty-nine".