689066611 has 2 divisors, whose sum is σ = 689066612. Its totient is φ = 689066610.

The previous prime is 689066579. The next prime is 689066629. The reversal of 689066611 is 116660986.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 689066611 - 2⁵ = 689066579 is a prime.

It is not a weakly prime, because it can be changed into another prime (689066641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344533305 + 344533306.

It is an arithmetic number, because the mean of its divisors is an integer number (344533306).

Almost surely, 2^689066611 is an apocalyptic number.

689066611 is a deficient number, since it is larger than the sum of its proper divisors (1).

689066611 is an equidigital number, since it uses as much as digits as its factorization.

689066611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 689066611 is about 26250.0783046451. The cubic root of 689066611 is about 883.2569610329.

Subtracting from 689066611 its reverse (116660986), we obtain a square (572405625 = 23925²).

The spelling of 689066611 in words is "six hundred eighty-nine million, sixty-six thousand, six hundred eleven".