689413717 has 2 divisors, whose sum is σ = 689413718. Its totient is φ = 689413716.

The previous prime is 689413693. The next prime is 689413757. The reversal of 689413717 is 717314986.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 681523236 + 7890481 = 26106^2 + 2809^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-689413717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (689413757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344706858 + 344706859.

It is an arithmetic number, because the mean of its divisors is an integer number (344706859).

Almost surely, 2^689413717 is an apocalyptic number.

It is an amenable number.

689413717 is a deficient number, since it is larger than the sum of its proper divisors (1).

689413717 is an equidigital number, since it uses as much as digits as its factorization.

689413717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 46.

The square root of 689413717 is about 26256.6889953779. The cubic root of 689413717 is about 883.4052448714.

The spelling of 689413717 in words is "six hundred eighty-nine million, four hundred thirteen thousand, seven hundred seventeen".