699823 has 2 divisors, whose sum is σ = 699824. Its totient is φ = 699822.

The previous prime is 699817. The next prime is 699863. The reversal of 699823 is 328996.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 699823 - 2⁵ = 699791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (699863) 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, 349911 + 349912.

It is an arithmetic number, because the mean of its divisors is an integer number (349912).

2⁶⁹⁹⁸²³ is an apocalyptic number.

699823 is a deficient number, since it is larger than the sum of its proper divisors (1).

699823 is an equidigital number, since it uses as much as digits as its factorization.

699823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 37.

The square root of 699823 is about 836.5542421146. The cubic root of 699823 is about 88.7829157811.

It can be divided in two parts, 6998 and 23, that added together give a triangular number (7021 = T₁₁₈).

The spelling of 699823 in words is "six hundred ninety-nine thousand, eight hundred twenty-three".