823057 has 4 divisors (see below), whose sum is σ = 825316. Its totient is φ = 820800.

The previous prime is 823051. The next prime is 823117. The reversal of 823057 is 750328.

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 408321 + 414736 = 639^2 + 644^2 .

It is a cyclic number.

It is not a de Polignac number, because 823057 - 2¹⁵ = 790289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (823051) 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, 444 + ... + 1357.

It is an arithmetic number, because the mean of its divisors is an integer number (206329).

2⁸²³⁰⁵⁷ is an apocalyptic number.

It is an amenable number.

823057 is a deficient number, since it is larger than the sum of its proper divisors (2259).

823057 is a wasteful number, since it uses less digits than its factorization.

823057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2258.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 823057 is about 907.2248894293. The cubic root of 823057 is about 93.7151858882.

The spelling of 823057 in words is "eight hundred twenty-three thousand, fifty-seven".