999804052213 has 2 divisors, whose sum is σ = 999804052214. Its totient is φ = 999804052212.

The previous prime is 999804052193. The next prime is 999804052279. The reversal of 999804052213 is 312250408999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 827912550609 + 171891501604 = 909897^2 + 414598^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999804052213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999804052283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499902026106 + 499902026107.

It is an arithmetic number, because the mean of its divisors is an integer number (499902026107).

Almost surely, 2^999804052213 is an apocalyptic number.

It is an amenable number.

999804052213 is a deficient number, since it is larger than the sum of its proper divisors (1).

999804052213 is an equidigital number, since it uses as much as digits as its factorization.

999804052213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1399680, while the sum is 52.

The spelling of 999804052213 in words is "nine hundred ninety-nine billion, eight hundred four million, fifty-two thousand, two hundred thirteen".