939823 has 2 divisors, whose sum is σ = 939824. Its totient is φ = 939822.

The previous prime is 939793. The next prime is 939839. The reversal of 939823 is 328939.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 939823 - 2⁵ = 939791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (939853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 469911 + 469912.

It is an arithmetic number, because the mean of its divisors is an integer number (469912).

2⁹³⁹⁸²³ is an apocalyptic number.

939823 is a deficient number, since it is larger than the sum of its proper divisors (1).

939823 is an equidigital number, since it uses as much as digits as its factorization.

939823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 34.

The square root of 939823 is about 969.4446864056. Note that the first 3 decimals coincide. The cubic root of 939823 is about 97.9524620196.

The spelling of 939823 in words is "nine hundred thirty-nine thousand, eight hundred twenty-three".