999958594361 has 2 divisors, whose sum is σ = 999958594362. Its totient is φ = 999958594360.

The previous prime is 999958594339. The next prime is 999958594363. The reversal of 999958594361 is 163495859999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 801417057961 + 198541536400 = 895219^2 + 445580^2 .

It is a cyclic number.

It is not a de Polignac number, because 999958594361 - 2¹⁴ = 999958577977 is a prime.

Together with 999958594363, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (999958594363) 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, 499979297180 + 499979297181.

It is an arithmetic number, because the mean of its divisors is an integer number (499979297181).

Almost surely, 2^999958594361 is an apocalyptic number.

It is an amenable number.

999958594361 is a deficient number, since it is larger than the sum of its proper divisors (1).

999958594361 is an equidigital number, since it uses as much as digits as its factorization.

999958594361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 850305600, while the sum is 77.

The spelling of 999958594361 in words is "nine hundred ninety-nine billion, nine hundred fifty-eight million, five hundred ninety-four thousand, three hundred sixty-one".