789693490609 has 9 divisors (see below), whose sum is σ = 817889985003. Its totient is φ = 762437798472.

The previous prime is 789693490601. The next prime is 789693490673. The reversal of 789693490609 is 906094396987.

The square root of 789693490609 is 888647.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 414096111009 + 375597379600 = 643503^2 + 612860^2 .

It is not a de Polignac number, because 789693490609 - 2³ = 789693490601 is a prime.

It is a super-2 number, since 2×789693490609² (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 (789693490601) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 25755442 + ... + 25786084.

Almost surely, 2^789693490609 is an apocalyptic number.

789693490609 is the 888647-th square number.

789693490609 is the 444324-th centered octagonal number.

It is an amenable number.

789693490609 is a deficient number, since it is larger than the sum of its proper divisors (28196494394).

789693490609 is an frugal number, since it uses more digits than its factorization.

789693490609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61344 (or 30672 counting only the distinct ones).

The product of its (nonzero) digits is 158723712, while the sum is 70.

The spelling of 789693490609 in words is "seven hundred eighty-nine billion, six hundred ninety-three million, four hundred ninety thousand, six hundred nine".