999804052813 has 2 divisors, whose sum is σ = 999804052814. Its totient is φ = 999804052812.

The previous prime is 999804052799. The next prime is 999804052837. The reversal of 999804052813 is 318250408999.

999804052813 = 707037² + 707038².

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 499902733444 + 499901319369 = 707038^2 + 707037^2 .

It is an emirp because it is prime and its reverse (318250408999) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999804052813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999804052213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499902026406 + 499902026407.

It is an arithmetic number, because the mean of its divisors is an integer number (499902026407).

Almost surely, 2^999804052813 is an apocalyptic number.

999804052813 is the 707038-th centered square number.

It is an amenable number.

999804052813 is a deficient number, since it is larger than the sum of its proper divisors (1).

999804052813 is an equidigital number, since it uses as much as digits as its factorization.

999804052813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5598720, while the sum is 58.

The spelling of 999804052813 in words is "nine hundred ninety-nine billion, eight hundred four million, fifty-two thousand, eight hundred thirteen".