78296506993 has 2 divisors, whose sum is σ = 78296506994. Its totient is φ = 78296506992.

The previous prime is 78296506931. The next prime is 78296507033. The reversal of 78296506993 is 39960569287.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42406341184 + 35890165809 = 205928^2 + 189447^2 .

It is an emirp because it is prime and its reverse (39960569287) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78296506993 - 2⁹ = 78296506481 is a prime.

It is a super-3 number, since 3×78296506993³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (78296506693) 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, 39148253496 + 39148253497.

It is an arithmetic number, because the mean of its divisors is an integer number (39148253497).

Almost surely, 2^78296506993 is an apocalyptic number.

It is an amenable number.

78296506993 is a deficient number, since it is larger than the sum of its proper divisors (1).

78296506993 is an equidigital number, since it uses as much as digits as its factorization.

78296506993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 44089920, while the sum is 64.

The spelling of 78296506993 in words is "seventy-eight billion, two hundred ninety-six million, five hundred six thousand, nine hundred ninety-three".