789649 has 4 divisors (see below), whose sum is σ = 902464. Its totient is φ = 676836.

The previous prime is 789631. The next prime is 789653. The reversal of 789649 is 946987.

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 789649 - 2⁹ = 789137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (789689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56397 + ... + 56410.

It is an arithmetic number, because the mean of its divisors is an integer number (225616).

2⁷⁸⁹⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

789649 is a deficient number, since it is larger than the sum of its proper divisors (112815).

789649 is a wasteful number, since it uses less digits than its factorization.

789649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112814.

The product of its digits is 108864, while the sum is 43.

The square root of 789649 is about 888.6219668678. The cubic root of 789649 is about 92.4296616478.

The spelling of 789649 in words is "seven hundred eighty-nine thousand, six hundred forty-nine".