79520219 has 2 divisors, whose sum is σ = 79520220. Its totient is φ = 79520218.

The previous prime is 79520191. The next prime is 79520249. The reversal of 79520219 is 91202597.

It is a weak prime.

It is an emirp because it is prime and its reverse (91202597) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79520219 - 2⁸ = 79519963 is a prime.

It is a super-2 number, since 2×79520219² = 12646930459615922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (79520249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39760109 + 39760110.

It is an arithmetic number, because the mean of its divisors is an integer number (39760110).

Almost surely, 2^79520219 is an apocalyptic number.

79520219 is a deficient number, since it is larger than the sum of its proper divisors (1).

79520219 is an equidigital number, since it uses as much as digits as its factorization.

79520219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 79520219 is about 8917.4110032004. The cubic root of 79520219 is about 430.0238295790.

The spelling of 79520219 in words is "seventy-nine million, five hundred twenty thousand, two hundred nineteen".