693221 has 4 divisors (see below), whose sum is σ = 701100. Its totient is φ = 685344.

The previous prime is 693179. The next prime is 693223. The reversal of 693221 is 122396.

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

It can be written as a sum of positive squares in 2 ways, for example, as 264196 + 429025 = 514^2 + 655^2 .

It is a cyclic number.

It is not a de Polignac number, because 693221 - 2⁶ = 693157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 693221.

It is not an unprimeable number, because it can be changed into a prime (693223) 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 3 ways as a sum of consecutive naturals, for example, 3806 + ... + 3983.

It is an arithmetic number, because the mean of its divisors is an integer number (175275).

2⁶⁹³²²¹ is an apocalyptic number.

It is an amenable number.

693221 is a deficient number, since it is larger than the sum of its proper divisors (7879).

693221 is an equidigital number, since it uses as much as digits as its factorization.

693221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7878.

The product of its digits is 648, while the sum is 23.

The square root of 693221 is about 832.5989430692. The cubic root of 693221 is about 88.5028460468.

The spelling of 693221 in words is "six hundred ninety-three thousand, two hundred twenty-one".