966869209 has 4 divisors (see below), whose sum is σ = 970631604. Its totient is φ = 963106816.

The previous prime is 966869201. The next prime is 966869221. The reversal of 966869209 is 902968669.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 902968669 = 199 ⋅4537531.

It can be written as a sum of positive squares in 2 ways, for example, as 428490000 + 538379209 = 20700^2 + 23203^2 .

It is a cyclic number.

It is not a de Polignac number, because 966869209 - 2³ = 966869201 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 966869209.

It is not an unprimeable number, because it can be changed into a prime (966869201) 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, 1880812 + ... + 1881325.

It is an arithmetic number, because the mean of its divisors is an integer number (242657901).

Almost surely, 2^966869209 is an apocalyptic number.

It is an amenable number.

966869209 is a deficient number, since it is larger than the sum of its proper divisors (3762395).

966869209 is a wasteful number, since it uses less digits than its factorization.

966869209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3762394.

The product of its (nonzero) digits is 2519424, while the sum is 55.

The square root of 966869209 is about 31094.5205623113. The cubic root of 966869209 is about 988.8321463329.

The spelling of 966869209 in words is "nine hundred sixty-six million, eight hundred sixty-nine thousand, two hundred nine".