850474991 has 6 divisors (see below), whose sum is σ = 862702776. Its totient is φ = 838254200.

The previous prime is 850474981. The next prime is 850475023. The reversal of 850474991 is 199474058.

It is not a de Polignac number, because 850474991 - 2⁶ = 850474927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (850474981) 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 5 ways as a sum of consecutive naturals, for example, 244001 + ... + 247461.

It is an arithmetic number, because the mean of its divisors is an integer number (143783796).

Almost surely, 2^850474991 is an apocalyptic number.

850474991 is a deficient number, since it is larger than the sum of its proper divisors (12227785).

850474991 is an frugal number, since it uses more digits than its factorization.

850474991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6993 (or 3532 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 850474991 is about 29162.9043649634. The cubic root of 850474991 is about 947.4446529121. Note that the first 3 decimals are identical.

The spelling of 850474991 in words is "eight hundred fifty million, four hundred seventy-four thousand, nine hundred ninety-one".