850053905 has 4 divisors (see below), whose sum is σ = 1020064692. Its totient is φ = 680043120.

The previous prime is 850053889. The next prime is 850053917. The reversal of 850053905 is 509350058.

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 147962896 + 702091009 = 12164^2 + 26497^2 .

It is not a de Polignac number, because 850053905 - 2⁴ = 850053889 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, 85005386 + ... + 85005395.

It is an arithmetic number, because the mean of its divisors is an integer number (255016173).

Almost surely, 2^850053905 is an apocalyptic number.

It is an amenable number.

850053905 is a deficient number, since it is larger than the sum of its proper divisors (170010787).

850053905 is a wasteful number, since it uses less digits than its factorization.

850053905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170010786.

The product of its (nonzero) digits is 27000, while the sum is 35.

The square root of 850053905 is about 29155.6839226934. The cubic root of 850053905 is about 947.2882612702.

The spelling of 850053905 in words is "eight hundred fifty million, fifty-three thousand, nine hundred five".