850920505 has 4 divisors (see below), whose sum is σ = 1021104612. Its totient is φ = 680736400.

The previous prime is 850920481. The next prime is 850920517. The reversal of 850920505 is 505029058.

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

It can be written as a sum of positive squares in 2 ways, for example, as 86508601 + 764411904 = 9301^2 + 27648^2 .

It is not a de Polignac number, because 850920505 - 2²³ = 842531897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85092046 + ... + 85092055.

It is an arithmetic number, because the mean of its divisors is an integer number (255276153).

Almost surely, 2^850920505 is an apocalyptic number.

It is an amenable number.

850920505 is a deficient number, since it is larger than the sum of its proper divisors (170184107).

850920505 is a wasteful number, since it uses less digits than its factorization.

850920505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170184106.

The product of its (nonzero) digits is 18000, while the sum is 34.

The square root of 850920505 is about 29170.5417330567. The cubic root of 850920505 is about 947.6100609404.

The spelling of 850920505 in words is "eight hundred fifty million, nine hundred twenty thousand, five hundred five".