999995999993 has 2 divisors, whose sum is σ = 999995999994. Its totient is φ = 999995999992.

The previous prime is 999995999983. The next prime is 999996000001. The reversal of 999995999993 is 399999599999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 983772373609 + 16223626384 = 991853^2 + 127372^2 .

It is a cyclic number.

It is not a de Polignac number, because 999995999993 - 2²² = 999991805689 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 999995999993.

It is not a weakly prime, because it can be changed into another prime (999995999903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499997999996 + 499997999997.

It is an arithmetic number, because the mean of its divisors is an integer number (499997999997).

Almost surely, 2^999995999993 is an apocalyptic number.

It is an amenable number.

999995999993 is a deficient number, since it is larger than the sum of its proper divisors (1).

999995999993 is an equidigital number, since it uses as much as digits as its factorization.

999995999993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52301766015, while the sum is 98.

The spelling of 999995999993 in words is "nine hundred ninety-nine billion, nine hundred ninety-five million, nine hundred ninety-nine thousand, nine hundred ninety-three".