789731609 has 4 divisors (see below), whose sum is σ = 790265616. Its totient is φ = 789197604.

The previous prime is 789731597. The next prime is 789731653. The reversal of 789731609 is 906137987.

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 789731609 - 2¹² = 789727513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (789731659) 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, 264779 + ... + 267744.

It is an arithmetic number, because the mean of its divisors is an integer number (197566404).

Almost surely, 2^789731609 is an apocalyptic number.

It is an amenable number.

789731609 is a deficient number, since it is larger than the sum of its proper divisors (534007).

789731609 is a wasteful number, since it uses less digits than its factorization.

789731609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534006.

The product of its (nonzero) digits is 571536, while the sum is 50.

The square root of 789731609 is about 28102.1637779015. The cubic root of 789731609 is about 924.3288470665.

The spelling of 789731609 in words is "seven hundred eighty-nine million, seven hundred thirty-one thousand, six hundred nine".