689407597 has 2 divisors, whose sum is σ = 689407598. Its totient is φ = 689407596.

The previous prime is 689407591. The next prime is 689407637. The reversal of 689407597 is 795704986.

689407597 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 684659556 + 4748041 = 26166^2 + 2179^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-689407597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (689407591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344703798 + 344703799.

It is an arithmetic number, because the mean of its divisors is an integer number (344703799).

Almost surely, 2^689407597 is an apocalyptic number.

It is an amenable number.

689407597 is a deficient number, since it is larger than the sum of its proper divisors (1).

689407597 is an equidigital number, since it uses as much as digits as its factorization.

689407597 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3810240, while the sum is 55.

The square root of 689407597 is about 26256.5724533877. The cubic root of 689407597 is about 883.4026308358.

The spelling of 689407597 in words is "six hundred eighty-nine million, four hundred seven thousand, five hundred ninety-seven".