812603053 has 4 divisors (see below), whose sum is σ = 812660220. Its totient is φ = 812545888.

The previous prime is 812602993. The next prime is 812603063. The reversal of 812603053 is 350306218.

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: 350306218 = 2 ⋅175153109.

It can be written as a sum of positive squares in 2 ways, for example, as 393704964 + 418898089 = 19842^2 + 20467^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-812603053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812603063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11151 + ... + 41827.

It is an arithmetic number, because the mean of its divisors is an integer number (203165055).

Almost surely, 2^812603053 is an apocalyptic number.

It is an amenable number.

812603053 is a deficient number, since it is larger than the sum of its proper divisors (57167).

812603053 is a wasteful number, since it uses less digits than its factorization.

812603053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57166.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 812603053 is about 28506.1932393647. The cubic root of 812603053 is about 933.1672384567.

The spelling of 812603053 in words is "eight hundred twelve million, six hundred three thousand, fifty-three".