789681 has 4 divisors (see below), whose sum is σ = 1052912. Its totient is φ = 526452.

The previous prime is 789673. The next prime is 789683. The reversal of 789681 is 186987.

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 not a de Polignac number, because 789681 - 2³ = 789673 is a prime.

It is a super-4 number, since 4×789681⁴ (a number of 25 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (789683) 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, 131611 + ... + 131616.

It is an arithmetic number, because the mean of its divisors is an integer number (263228).

2⁷⁸⁹⁶⁸¹ is an apocalyptic number.

It is an amenable number.

789681 is a deficient number, since it is larger than the sum of its proper divisors (263231).

789681 is a wasteful number, since it uses less digits than its factorization.

789681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263230.

The product of its digits is 24192, while the sum is 39.

The square root of 789681 is about 888.6399720922. The cubic root of 789681 is about 92.4309101811.

The spelling of 789681 in words is "seven hundred eighty-nine thousand, six hundred eighty-one".