79038333821 has 2 divisors, whose sum is σ = 79038333822. Its totient is φ = 79038333820.

The previous prime is 79038333791. The next prime is 79038333859. The reversal of 79038333821 is 12833383097.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78986292025 + 52041796 = 281045^2 + 7214^2 .

It is an emirp because it is prime and its reverse (12833383097) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79038333821 - 2¹⁴ = 79038317437 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79038333721) 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, 39519166910 + 39519166911.

It is an arithmetic number, because the mean of its divisors is an integer number (39519166911).

Almost surely, 2^79038333821 is an apocalyptic number.

It is an amenable number.

79038333821 is a deficient number, since it is larger than the sum of its proper divisors (1).

79038333821 is an equidigital number, since it uses as much as digits as its factorization.

79038333821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 653184, while the sum is 47.

The spelling of 79038333821 in words is "seventy-nine billion, thirty-eight million, three hundred thirty-three thousand, eight hundred twenty-one".