689753321 has 2 divisors, whose sum is σ = 689753322. Its totient is φ = 689753320.

The previous prime is 689753269. The next prime is 689753369. The reversal of 689753321 is 123357986.

689753321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 562875625 + 126877696 = 23725^2 + 11264^2 .

It is a cyclic number.

It is not a de Polignac number, because 689753321 - 2²⁶ = 622644457 is a prime.

It is not a weakly prime, because it can be changed into another prime (689753021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344876660 + 344876661.

It is an arithmetic number, because the mean of its divisors is an integer number (344876661).

Almost surely, 2^689753321 is an apocalyptic number.

It is an amenable number.

689753321 is a deficient number, since it is larger than the sum of its proper divisors (1).

689753321 is an equidigital number, since it uses as much as digits as its factorization.

689753321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 44.

The square root of 689753321 is about 26263.1551988713. The cubic root of 689753321 is about 883.5502756900.

The spelling of 689753321 in words is "six hundred eighty-nine million, seven hundred fifty-three thousand, three hundred twenty-one".