830857 has 4 divisors (see below), whose sum is σ = 833796. Its totient is φ = 827920.

The previous prime is 830849. The next prime is 830861. The reversal of 830857 is 758038.

830857 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 335241 + 495616 = 579^2 + 704^2 .

It is a cyclic number.

It is not a de Polignac number, because 830857 - 2³ = 830849 is a prime.

It is a d-powerful number, because it can be written as 8² + 3⁸ + 8² + 0 + 5⁴ + 7⁷ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (830827) 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, 994 + ... + 1627.

It is an arithmetic number, because the mean of its divisors is an integer number (208449).

2⁸³⁰⁸⁵⁷ is an apocalyptic number.

It is an amenable number.

830857 is a deficient number, since it is larger than the sum of its proper divisors (2939).

830857 is a wasteful number, since it uses less digits than its factorization.

830857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2938.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 830857 is about 911.5135764211. The cubic root of 830857 is about 94.0102976496.

The spelling of 830857 in words is "eight hundred thirty thousand, eight hundred fifty-seven".