689491417 has 2 divisors, whose sum is σ = 689491418. Its totient is φ = 689491416.

The previous prime is 689491403. The next prime is 689491421. The reversal of 689491417 is 714194986.

689491417 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., 428862681 + 260628736 = 20709^2 + 16144^2 .

It is a cyclic number.

It is not a de Polignac number, because 689491417 - 2⁷ = 689491289 is a prime.

It is not a weakly prime, because it can be changed into another prime (689491427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344745708 + 344745709.

It is an arithmetic number, because the mean of its divisors is an integer number (344745709).

Almost surely, 2^689491417 is an apocalyptic number.

It is an amenable number.

689491417 is a deficient number, since it is larger than the sum of its proper divisors (1).

689491417 is an equidigital number, since it uses as much as digits as its factorization.

689491417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 49.

The square root of 689491417 is about 26258.1685766544. The cubic root of 689491417 is about 883.4384315281.

The spelling of 689491417 in words is "six hundred eighty-nine million, four hundred ninety-one thousand, four hundred seventeen".