850904999 has 4 divisors (see below), whose sum is σ = 972462864. Its totient is φ = 729347136.

The previous prime is 850904869. The next prime is 850905007. The reversal of 850904999 is 999409058.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 999409058 = 2 ⋅499704529.

It is not a de Polignac number, because 850904999 - 2¹⁶ = 850839463 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 850904999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (850904099) 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, 60778922 + ... + 60778935.

It is an arithmetic number, because the mean of its divisors is an integer number (243115716).

Almost surely, 2^850904999 is an apocalyptic number.

850904999 is a deficient number, since it is larger than the sum of its proper divisors (121557865).

850904999 is a wasteful number, since it uses less digits than its factorization.

850904999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121557864.

The product of its (nonzero) digits is 1049760, while the sum is 53.

The square root of 850904999 is about 29170.2759500146. The cubic root of 850904999 is about 947.6043049264.

The spelling of 850904999 in words is "eight hundred fifty million, nine hundred four thousand, nine hundred ninety-nine".