916789 has 4 divisors (see below), whose sum is σ = 927180. Its totient is φ = 906400.

The previous prime is 916787. The next prime is 916831. The reversal of 916789 is 987619.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 987619 = 307 ⋅3217.

It can be written as a sum of positive squares in 2 ways, for example, as 574564 + 342225 = 758^2 + 585^2 .

It is a cyclic number.

It is not a de Polignac number, because 916789 - 2¹ = 916787 is a prime.

It is a Duffinian number.

916789 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (916781) 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, 5062 + ... + 5239.

It is an arithmetic number, because the mean of its divisors is an integer number (231795).

2⁹¹⁶⁷⁸⁹ is an apocalyptic number.

It is an amenable number.

916789 is a deficient number, since it is larger than the sum of its proper divisors (10391).

916789 is a wasteful number, since it uses less digits than its factorization.

916789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10390.

The product of its digits is 27216, while the sum is 40.

The square root of 916789 is about 957.4909921247. The cubic root of 916789 is about 97.1455991770.

The spelling of 916789 in words is "nine hundred sixteen thousand, seven hundred eighty-nine".