689258728859 has 4 divisors (see below), whose sum is σ = 689402299320. Its totient is φ = 689115158400.

The previous prime is 689258728843. The next prime is 689258728861. The reversal of 689258728859 is 958827852986.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 958827852986 = 2 ⋅479413926493.

It is a cyclic number.

It is not a de Polignac number, because 689258728859 - 2⁴ = 689258728843 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 689258728859.

It is not an unprimeable number, because it can be changed into a prime (689258721859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71778029 + ... + 71787630.

It is an arithmetic number, because the mean of its divisors is an integer number (172350574830).

Almost surely, 2^689258728859 is an apocalyptic number.

689258728859 is a deficient number, since it is larger than the sum of its proper divisors (143570461).

689258728859 is a wasteful number, since it uses less digits than its factorization.

689258728859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143570460.

The product of its digits is 1393459200, while the sum is 77.

The spelling of 689258728859 in words is "six hundred eighty-nine billion, two hundred fifty-eight million, seven hundred twenty-eight thousand, eight hundred fifty-nine".