851849305 has 4 divisors (see below), whose sum is σ = 1022219172. Its totient is φ = 681479440.

The previous prime is 851849263. The next prime is 851849347. The reversal of 851849305 is 503948158.

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

It is an interprime number because it is at equal distance from previous prime (851849263) and next prime (851849347).

It can be written as a sum of positive squares in 2 ways, for example, as 87160896 + 764688409 = 9336^2 + 27653^2 .

It is not a de Polignac number, because 851849305 - 2¹⁷ = 851718233 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85184926 + ... + 85184935.

It is an arithmetic number, because the mean of its divisors is an integer number (255554793).

Almost surely, 2^851849305 is an apocalyptic number.

It is an amenable number.

851849305 is a deficient number, since it is larger than the sum of its proper divisors (170369867).

851849305 is a wasteful number, since it uses less digits than its factorization.

851849305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170369866.

The product of its (nonzero) digits is 172800, while the sum is 43.

The square root of 851849305 is about 29186.4575616843. The cubic root of 851849305 is about 947.9547152225.

The spelling of 851849305 in words is "eight hundred fifty-one million, eight hundred forty-nine thousand, three hundred five".