79991201219 has 2 divisors, whose sum is σ = 79991201220. Its totient is φ = 79991201218.

The previous prime is 79991201177. The next prime is 79991201273. The reversal of 79991201219 is 91210219997.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 79991201219 - 2³² = 75696233923 is a prime.

It is a super-2 number, since 2×79991201219² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (79991201299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39995600609 + 39995600610.

It is an arithmetic number, because the mean of its divisors is an integer number (39995600610).

Almost surely, 2^79991201219 is an apocalyptic number.

79991201219 is a deficient number, since it is larger than the sum of its proper divisors (1).

79991201219 is an equidigital number, since it uses as much as digits as its factorization.

79991201219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 183708, while the sum is 50.

The spelling of 79991201219 in words is "seventy-nine billion, nine hundred ninety-one million, two hundred one thousand, two hundred nineteen".