79805569 has 4 divisors (see below), whose sum is σ = 79966000. Its totient is φ = 79645140.

The previous prime is 79805527. The next prime is 79805581. The reversal of 79805569 is 96550897.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 79805569 - 2⁹ = 79805057 is a prime.

It is a super-2 number, since 2×79805569² = 12737857686827522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79805669) 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 3 ways as a sum of consecutive naturals, for example, 79467 + ... + 80464.

It is an arithmetic number, because the mean of its divisors is an integer number (19991500).

Almost surely, 2^79805569 is an apocalyptic number.

It is an amenable number.

79805569 is a deficient number, since it is larger than the sum of its proper divisors (160431).

79805569 is a wasteful number, since it uses less digits than its factorization.

79805569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160430.

The product of its (nonzero) digits is 680400, while the sum is 49.

The square root of 79805569 is about 8933.3962746539. The cubic root of 79805569 is about 430.5375807528.

The spelling of 79805569 in words is "seventy-nine million, eight hundred five thousand, five hundred sixty-nine".