698823 has 6 divisors (see below), whose sum is σ = 1009424. Its totient is φ = 465876.

The previous prime is 698821. The next prime is 698827. The reversal of 698823 is 328896.

It is not a de Polignac number, because 698823 - 2¹ = 698821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (698821) 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 5 ways as a sum of consecutive naturals, for example, 38815 + ... + 38832.

2⁶⁹⁸⁸²³ is an apocalyptic number.

698823 is a deficient number, since it is larger than the sum of its proper divisors (310601).

698823 is a wasteful number, since it uses less digits than its factorization.

698823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77653 (or 77650 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 698823 is about 835.9563385728. The cubic root of 698823 is about 88.7406073509.

It can be divided in two parts, 698 and 823, that added together give a square (1521 = 39²).

The spelling of 698823 in words is "six hundred ninety-eight thousand, eight hundred twenty-three".