789994729609 has 4 divisors (see below), whose sum is σ = 790679895316. Its totient is φ = 789309563904.

The previous prime is 789994729591. The next prime is 789994729669. The reversal of 789994729609 is 906927499987.

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 739909632400 + 50085097209 = 860180^2 + 223797^2 .

It is a cyclic number.

It is not a de Polignac number, because 789994729609 - 2²⁹ = 789457858697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (789994729669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 342581124 + ... + 342583429.

It is an arithmetic number, because the mean of its divisors is an integer number (197669973829).

Almost surely, 2^789994729609 is an apocalyptic number.

It is an amenable number.

789994729609 is a deficient number, since it is larger than the sum of its proper divisors (685165707).

789994729609 is a wasteful number, since it uses less digits than its factorization.

789994729609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685165706.

The product of its (nonzero) digits is 1111065984, while the sum is 79.

The spelling of 789994729609 in words is "seven hundred eighty-nine billion, nine hundred ninety-four million, seven hundred twenty-nine thousand, six hundred nine".