689146717 has 4 divisors (see below), whose sum is σ = 787596256. Its totient is φ = 590697180.

The previous prime is 689146693. The next prime is 689146741. The reversal of 689146717 is 717641986.

689146717 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 717641986 = 2 ⋅358820993.

It is an interprime number because it is at equal distance from previous prime (689146693) and next prime (689146741).

It is a cyclic number.

It is not a de Polignac number, because 689146717 - 2²⁷ = 554928989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689146747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49224759 + ... + 49224772.

It is an arithmetic number, because the mean of its divisors is an integer number (196899064).

Almost surely, 2^689146717 is an apocalyptic number.

It is an amenable number.

689146717 is a deficient number, since it is larger than the sum of its proper divisors (98449539).

689146717 is an equidigital number, since it uses as much as digits as its factorization.

689146717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98449538.

The product of its digits is 508032, while the sum is 49.

The square root of 689146717 is about 26251.6040843222. The cubic root of 689146717 is about 883.2911867712.

The spelling of 689146717 in words is "six hundred eighty-nine million, one hundred forty-six thousand, seven hundred seventeen".