79219217 has 16 divisors (see below), whose sum is σ = 99411072. Its totient is φ = 61326720.

The previous prime is 79219211. The next prime is 79219247. The reversal of 79219217 is 71291297.

It is a de Polignac number, because none of the positive numbers 2^k-79219217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79219211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8813 + ... + 15365.

It is an arithmetic number, because the mean of its divisors is an integer number (6213192).

Almost surely, 2^79219217 is an apocalyptic number.

79219217 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

It is an amenable number.

79219217 is a deficient number, since it is larger than the sum of its proper divisors (20191855).

79219217 is a wasteful number, since it uses less digits than its factorization.

79219217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6728.

The product of its digits is 15876, while the sum is 38.

The square root of 79219217 is about 8900.5177939264. The cubic root of 79219217 is about 429.4805644149.

The spelling of 79219217 in words is "seventy-nine million, two hundred nineteen thousand, two hundred seventeen".