79942577219 has 2 divisors, whose sum is σ = 79942577220. Its totient is φ = 79942577218.

The previous prime is 79942577173. The next prime is 79942577243. The reversal of 79942577219 is 91277524997.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79942577219 - 2¹⁶ = 79942511683 is a prime.

It is a super-2 number, since 2×79942577219² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (79942577279) 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, 39971288609 + 39971288610.

It is an arithmetic number, because the mean of its divisors is an integer number (39971288610).

Almost surely, 2^79942577219 is an apocalyptic number.

79942577219 is a deficient number, since it is larger than the sum of its proper divisors (1).

79942577219 is an equidigital number, since it uses as much as digits as its factorization.

79942577219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20003760, while the sum is 62.

The spelling of 79942577219 in words is "seventy-nine billion, nine hundred forty-two million, five hundred seventy-seven thousand, two hundred nineteen".