850649 has 4 divisors (see below), whose sum is σ = 895440. Its totient is φ = 805860.

The previous prime is 850637. The next prime is 850673. The reversal of 850649 is 946058.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 850649 - 2⁸ = 850393 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 850649.

It is not an unprimeable number, because it can be changed into a prime (850679) 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, 22367 + ... + 22404.

It is an arithmetic number, because the mean of its divisors is an integer number (223860).

2⁸⁵⁰⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

850649 is a deficient number, since it is larger than the sum of its proper divisors (44791).

850649 is a wasteful number, since it uses less digits than its factorization.

850649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44790.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 850649 is about 922.3063482379. The cubic root of 850649 is about 94.7509264906.

The spelling of 850649 in words is "eight hundred fifty thousand, six hundred forty-nine".