830689 has 4 divisors (see below), whose sum is σ = 838420. Its totient is φ = 822960.

The previous prime is 830677. The next prime is 830693. The reversal of 830689 is 986038.

830689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 664225 + 166464 = 815^2 + 408^2 .

It is a cyclic number.

It is not a de Polignac number, because 830689 - 2⁵ = 830657 is a prime.

It is an Ulam number.

It is a Duffinian number.

830689 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (830639) 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, 3702 + ... + 3919.

It is an arithmetic number, because the mean of its divisors is an integer number (209605).

2⁸³⁰⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

830689 is a deficient number, since it is larger than the sum of its proper divisors (7731).

830689 is a wasteful number, since it uses less digits than its factorization.

830689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7730.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 830689 is about 911.4214173477. The cubic root of 830689 is about 94.0039609015.

The spelling of 830689 in words is "eight hundred thirty thousand, six hundred eighty-nine".