851736073 has 4 divisors (see below), whose sum is σ = 851813380. Its totient is φ = 851658768.

The previous prime is 851736071. The next prime is 851736097. The reversal of 851736073 is 370637158.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 370637158 = 2 ⋅185318579.

It can be written as a sum of positive squares in 2 ways, for example, as 265950864 + 585785209 = 16308^2 + 24203^2 .

It is a cyclic number.

It is not a de Polignac number, because 851736073 - 2¹ = 851736071 is a prime.

It is a super-2 number, since 2×851736073² = 1450908676098922658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (851736071) by changing a digit.

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, 18690 + ... + 45307.

It is an arithmetic number, because the mean of its divisors is an integer number (212953345).

Almost surely, 2^851736073 is an apocalyptic number.

It is an amenable number.

851736073 is a deficient number, since it is larger than the sum of its proper divisors (77307).

851736073 is a wasteful number, since it uses less digits than its factorization.

851736073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77306.

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 851736073 is about 29184.5176934621. The cubic root of 851736073 is about 947.9127110933.

The spelling of 851736073 in words is "eight hundred fifty-one million, seven hundred thirty-six thousand, seventy-three".