823011 has 8 divisors (see below), whose sum is σ = 1254144. Its totient is φ = 470280.

The previous prime is 823003. The next prime is 823013. The reversal of 823011 is 110328.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 823011 - 2³ = 823003 is a prime.

It is a super-2 number, since 2×823011² = 1354694212242, which contains 22 as substring.

823011 is a lucky number.

It is a nialpdrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (823013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19575 + ... + 19616.

It is an arithmetic number, because the mean of its divisors is an integer number (156768).

2⁸²³⁰¹¹ is an apocalyptic number.

823011 is a deficient number, since it is larger than the sum of its proper divisors (431133).

823011 is a wasteful number, since it uses less digits than its factorization.

823011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39201.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 823011 is about 907.1995370369. The cubic root of 823011 is about 93.7134399666.

Adding to 823011 its reverse (110328), we get a palindrome (933339).

The spelling of 823011 in words is "eight hundred twenty-three thousand, eleven".