850212191 has 4 divisors (see below), whose sum is σ = 851014584. Its totient is φ = 849409800.

The previous prime is 850212173. The next prime is 850212221. The reversal of 850212191 is 191212058.

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

It is a cyclic number.

It is not a de Polignac number, because 850212191 - 2¹⁴ = 850195807 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 (850212131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 399605 + ... + 401726.

It is an arithmetic number, because the mean of its divisors is an integer number (212753646).

Almost surely, 2^850212191 is an apocalyptic number.

850212191 is a deficient number, since it is larger than the sum of its proper divisors (802393).

850212191 is a wasteful number, since it uses less digits than its factorization.

850212191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802392.

The product of its (nonzero) digits is 1440, while the sum is 29.

The square root of 850212191 is about 29158.3982927732. The cubic root of 850212191 is about 947.3470548608.

The spelling of 850212191 in words is "eight hundred fifty million, two hundred twelve thousand, one hundred ninety-one".