812066503 has 4 divisors (see below), whose sum is σ = 812148768. Its totient is φ = 811984240.

The previous prime is 812066473. The next prime is 812066531. The reversal of 812066503 is 305660218.

812066503 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 305660218 = 2 ⋅152830109.

It is a cyclic number.

It is not a de Polignac number, because 812066503 - 2⁵ = 812066471 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 (812066573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23926 + ... + 46867.

It is an arithmetic number, because the mean of its divisors is an integer number (203037192).

Almost surely, 2^812066503 is an apocalyptic number.

812066503 is a deficient number, since it is larger than the sum of its proper divisors (82265).

812066503 is a wasteful number, since it uses less digits than its factorization.

812066503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82264.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 812066503 is about 28496.7805725489. The cubic root of 812066503 is about 932.9618076419.

The spelling of 812066503 in words is "eight hundred twelve million, sixty-six thousand, five hundred three".