690223 has 4 divisors (see below), whose sum is σ = 699040. Its totient is φ = 681408.

The previous prime is 690187. The next prime is 690233. The reversal of 690223 is 322096.

690223 is nontrivially palindromic in base 15.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-690223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 690194 and 690203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4290 + ... + 4447.

It is an arithmetic number, because the mean of its divisors is an integer number (174760).

2⁶⁹⁰²²³ is an apocalyptic number.

690223 is a deficient number, since it is larger than the sum of its proper divisors (8817).

690223 is an equidigital number, since it uses as much as digits as its factorization.

690223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8816.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 690223 is about 830.7966056743. The cubic root of 690223 is about 88.3750777734.

The spelling of 690223 in words is "six hundred ninety thousand, two hundred twenty-three".