709005665609 has 4 divisors (see below), whose sum is σ = 713701067520. Its totient is φ = 704310263700.

The previous prime is 709005665587. The next prime is 709005665657. The reversal of 709005665609 is 906566500907.

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 709005665609 - 2²⁰ = 709004617033 is a prime.

It is a super-2 number, since 2×709005665609² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (709005665209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2347700729 + ... + 2347701030.

It is an arithmetic number, because the mean of its divisors is an integer number (178425266880).

Almost surely, 2^709005665609 is an apocalyptic number.

It is an amenable number.

709005665609 is a deficient number, since it is larger than the sum of its proper divisors (4695401911).

709005665609 is a wasteful number, since it uses less digits than its factorization.

709005665609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4695401910.

The product of its (nonzero) digits is 3061800, while the sum is 53.

The spelling of 709005665609 in words is "seven hundred nine billion, five million, six hundred sixty-five thousand, six hundred nine".