79220017 has 4 divisors (see below), whose sum is σ = 83880036. Its totient is φ = 74560000.

The previous prime is 79220003. The next prime is 79220021. The reversal of 79220017 is 71002297.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30206016 + 49014001 = 5496^2 + 7001^2 .

It is a cyclic number.

It is not a de Polignac number, because 79220017 - 2¹¹ = 79217969 is a prime.

It is a super-2 number, since 2×79220017² = 12551622186960578, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79220047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2329984 + ... + 2330017.

It is an arithmetic number, because the mean of its divisors is an integer number (20970009).

Almost surely, 2^79220017 is an apocalyptic number.

It is an amenable number.

79220017 is a deficient number, since it is larger than the sum of its proper divisors (4660019).

79220017 is a wasteful number, since it uses less digits than its factorization.

79220017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4660018.

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 79220017 is about 8900.5627350185. The cubic root of 79220017 is about 429.4820101218.

The spelling of 79220017 in words is "seventy-nine million, two hundred twenty thousand, seventeen".