966809439 has 20 divisors (see below), whose sum is σ = 1507042416. Its totient is φ = 616514976.

The previous prime is 966809429. The next prime is 966809447. The reversal of 966809439 is 934908669.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-966809439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (966809429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 257614 + ... + 261339.

Almost surely, 2^966809439 is an apocalyptic number.

966809439 is a deficient number, since it is larger than the sum of its proper divisors (540232977).

966809439 is a wasteful number, since it uses less digits than its factorization.

966809439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518988 (or 518979 counting only the distinct ones).

The product of its (nonzero) digits is 2519424, while the sum is 54.

The square root of 966809439 is about 31093.5594456473. The cubic root of 966809439 is about 988.8117700108.

The spelling of 966809439 in words is "nine hundred sixty-six million, eight hundred nine thousand, four hundred thirty-nine".