999999997763993 has 2 divisors, whose sum is σ = 999999997763994. Its totient is φ = 999999997763992.

The previous prime is 999999997763959. The next prime is 999999997763999. The reversal of 999999997763993 is 399367799999999.

999999997763993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 699019240416784 + 300980757347209 = 26438972^2 + 17348797^2 .

It is an emirp because it is prime and its reverse (399367799999999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999999997763993 - 2¹⁸ = 999999997501849 is a prime.

It is not a weakly prime, because it can be changed into another prime (999999997763999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499999998881996 + 499999998881997.

It is an arithmetic number, because the mean of its divisors is an integer number (499999998881997).

Almost surely, 2^{999999997763993} is an apocalyptic number.

It is an amenable number.

999999997763993 is a deficient number, since it is larger than the sum of its proper divisors (1).

999999997763993 is an equidigital number, since it uses as much as digits as its factorization.

999999997763993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9226031525046, while the sum is 116.

The spelling of 999999997763993 in words is "nine hundred ninety-nine trillion, nine hundred ninety-nine billion, nine hundred ninety-seven million, seven hundred sixty-three thousand, nine hundred ninety-three".