850941921 has 32 divisors (see below), whose sum is σ = 1195286400. Its totient is φ = 537868800.

The previous prime is 850941901. The next prime is 850941929. The reversal of 850941921 is 129149058.

It is not a de Polignac number, because 850941921 - 2⁶ = 850941857 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 850941921.

It is not an unprimeable number, because it can be changed into a prime (850941929) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1845631 + ... + 1846091.

It is an arithmetic number, because the mean of its divisors is an integer number (37352700).

Almost surely, 2^850941921 is an apocalyptic number.

It is an amenable number.

850941921 is a deficient number, since it is larger than the sum of its proper divisors (344344479).

850941921 is a wasteful number, since it uses less digits than its factorization.

850941921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897.

The product of its (nonzero) digits is 25920, while the sum is 39.

The square root of 850941921 is about 29170.9088134052. The cubic root of 850941921 is about 947.6180107025.

The spelling of 850941921 in words is "eight hundred fifty million, nine hundred forty-one thousand, nine hundred twenty-one".