689089901 has 2 divisors, whose sum is σ = 689089902. Its totient is φ = 689089900.

The previous prime is 689089873. The next prime is 689089927. The reversal of 689089901 is 109980986.

689089901 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., 505080676 + 184009225 = 22474^2 + 13565^2 .

It is a cyclic number.

It is not a de Polignac number, because 689089901 - 2²⁶ = 621981037 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 689089901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (689089981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344544950 + 344544951.

It is an arithmetic number, because the mean of its divisors is an integer number (344544951).

Almost surely, 2^689089901 is an apocalyptic number.

It is an amenable number.

689089901 is a deficient number, since it is larger than the sum of its proper divisors (1).

689089901 is an equidigital number, since it uses as much as digits as its factorization.

689089901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 50.

The square root of 689089901 is about 26250.5219186210. The cubic root of 689089901 is about 883.2669120896.

The spelling of 689089901 in words is "six hundred eighty-nine million, eighty-nine thousand, nine hundred one".