999993001013 has 2 divisors, whose sum is σ = 999993001014. Its totient is φ = 999993001012.

The previous prime is 999993001009. The next prime is 999993001031. The reversal of 999993001013 is 310100399999.

Together with next prime (999993001031) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 931645787524 + 68347213489 = 965218^2 + 261433^2 .

It is a cyclic number.

It is not a de Polignac number, because 999993001013 - 2² = 999993001009 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999993001093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499996500506 + 499996500507.

It is an arithmetic number, because the mean of its divisors is an integer number (499996500507).

Almost surely, 2^999993001013 is an apocalyptic number.

It is an amenable number.

999993001013 is a deficient number, since it is larger than the sum of its proper divisors (1).

999993001013 is an equidigital number, since it uses as much as digits as its factorization.

999993001013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 531441, while the sum is 53.

The spelling of 999993001013 in words is "nine hundred ninety-nine billion, nine hundred ninety-three million, one thousand, thirteen".