79720228319 has 2 divisors, whose sum is σ = 79720228320. Its totient is φ = 79720228318.

The previous prime is 79720228283. The next prime is 79720228369. The reversal of 79720228319 is 91382202797.

It is an a-pointer prime, because the next prime (79720228369) can be obtained adding 79720228319 to its sum of digits (50).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 79720228319 - 2¹² = 79720224223 is a prime.

It is a super-2 number, since 2×79720228319² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79720228369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39860114159 + 39860114160.

It is an arithmetic number, because the mean of its divisors is an integer number (39860114160).

Almost surely, 2^79720228319 is an apocalyptic number.

79720228319 is a deficient number, since it is larger than the sum of its proper divisors (1).

79720228319 is an equidigital number, since it uses as much as digits as its factorization.

79720228319 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 762048, while the sum is 50.

The spelling of 79720228319 in words is "seventy-nine billion, seven hundred twenty million, two hundred twenty-eight thousand, three hundred nineteen".