999961448323693 has 2 divisors, whose sum is σ = 999961448323694. Its totient is φ = 999961448323692.

The previous prime is 999961448323679. The next prime is 999961448323723. The reversal of 999961448323693 is 396323844169999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 993734961167844 + 6226487155849 = 31523562^2 + 2495293^2 .

It is a cyclic number.

It is not a de Polignac number, because 999961448323693 - 2⁴⁵ = 964777076234861 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 999961448323693.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999961448327693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499980724161846 + 499980724161847.

It is an arithmetic number, because the mean of its divisors is an integer number (499980724161847).

Almost surely, 2^{999961448323693} is an apocalyptic number.

It is an amenable number.

999961448323693 is a deficient number, since it is larger than the sum of its proper divisors (1).

999961448323693 is an equidigital number, since it uses as much as digits as its factorization.

999961448323693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14693280768, while the sum is 85.

The spelling of 999961448323693 in words is "nine hundred ninety-nine trillion, nine hundred sixty-one billion, four hundred forty-eight million, three hundred twenty-three thousand, six hundred ninety-three".