820053103 has 4 divisors (see below), whose sum is σ = 820142560. Its totient is φ = 819963648.

The previous prime is 820053079. The next prime is 820053121. The reversal of 820053103 is 301350028.

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.

It is a cyclic number.

It is not a de Polignac number, because 820053103 - 2⁹ = 820052591 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 (820057103) 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, 29175 + ... + 49912.

It is an arithmetic number, because the mean of its divisors is an integer number (205035640).

Almost surely, 2^820053103 is an apocalyptic number.

820053103 is a deficient number, since it is larger than the sum of its proper divisors (89457).

820053103 is a wasteful number, since it uses less digits than its factorization.

820053103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89456.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 820053103 is about 28636.5693301415. The cubic root of 820053103 is about 936.0103667095.

The spelling of 820053103 in words is "eight hundred twenty million, fifty-three thousand, one hundred three".