79181380793 has 2 divisors, whose sum is σ = 79181380794. Its totient is φ = 79181380792.

The previous prime is 79181380783. The next prime is 79181380799. The reversal of 79181380793 is 39708318197.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56526013504 + 22655367289 = 237752^2 + 150517^2 .

It is a cyclic number.

It is not a de Polignac number, because 79181380793 - 2¹⁰ = 79181379769 is a prime.

It is not a weakly prime, because it can be changed into another prime (79181380799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39590690396 + 39590690397.

It is an arithmetic number, because the mean of its divisors is an integer number (39590690397).

Almost surely, 2^79181380793 is an apocalyptic number.

It is an amenable number.

79181380793 is a deficient number, since it is larger than the sum of its proper divisors (1).

79181380793 is an equidigital number, since it uses as much as digits as its factorization.

79181380793 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2286144, while the sum is 56.

The spelling of 79181380793 in words is "seventy-nine billion, one hundred eighty-one million, three hundred eighty thousand, seven hundred ninety-three".