850879669 has 4 divisors (see below), whose sum is σ = 851151340. Its totient is φ = 850608000.

The previous prime is 850879613. The next prime is 850879693. The reversal of 850879669 is 966978058.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 395612100 + 455267569 = 19890^2 + 21337^2 .

It is a cyclic number.

It is not a de Polignac number, because 850879669 - 2⁷ = 850879541 is a prime.

It is a super-2 number, since 2×850879669² = 1447992422235099122, 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 (850879369) 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 3 ways as a sum of consecutive naturals, for example, 131082 + ... + 137419.

It is an arithmetic number, because the mean of its divisors is an integer number (212787835).

Almost surely, 2^850879669 is an apocalyptic number.

It is an amenable number.

850879669 is a deficient number, since it is larger than the sum of its proper divisors (271671).

850879669 is a wasteful number, since it uses less digits than its factorization.

850879669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271670.

The product of its (nonzero) digits is 6531840, while the sum is 58.

The square root of 850879669 is about 29169.8417719397. The cubic root of 850879669 is about 947.5949019750.

The spelling of 850879669 in words is "eight hundred fifty million, eight hundred seventy-nine thousand, six hundred sixty-nine".