999993874626613 has 2 divisors, whose sum is σ = 999993874626614. Its totient is φ = 999993874626612.

The previous prime is 999993874626521. The next prime is 999993874626623. The reversal of 999993874626613 is 316626478399999.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 913265202397284 + 86728672229329 = 30220278^2 + 9312823^2 .

It is an emirp because it is prime and its reverse (316626478399999) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999993874626613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999993874626623) 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, 499996937313306 + 499996937313307.

It is an arithmetic number, because the mean of its divisors is an integer number (499996937313307).

Almost surely, 2^{999993874626613} is an apocalyptic number.

It is an amenable number.

999993874626613 is a deficient number, since it is larger than the sum of its proper divisors (1).

999993874626613 is an equidigital number, since it uses as much as digits as its factorization.

999993874626613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51426482688, while the sum is 91.

The spelling of 999993874626613 in words is "nine hundred ninety-nine trillion, nine hundred ninety-three billion, eight hundred seventy-four million, six hundred twenty-six thousand, six hundred thirteen".