823913 has 2 divisors, whose sum is σ = 823914. Its totient is φ = 823912.

The previous prime is 823903. The next prime is 823961. The reversal of 823913 is 319328.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 506944 + 316969 = 712^2 + 563^2 .

It is a cyclic number.

It is not a de Polignac number, because 823913 - 2¹⁰ = 822889 is a prime.

It is not a weakly prime, because it can be changed into another prime (823903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 411956 + 411957.

It is an arithmetic number, because the mean of its divisors is an integer number (411957).

2⁸²³⁹¹³ is an apocalyptic number.

It is an amenable number.

823913 is a deficient number, since it is larger than the sum of its proper divisors (1).

823913 is an equidigital number, since it uses as much as digits as its factorization.

823913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 26.

The square root of 823913 is about 907.6965351922. The cubic root of 823913 is about 93.7476633492.

The spelling of 823913 in words is "eight hundred twenty-three thousand, nine hundred thirteen".