689189757 has 16 divisors (see below), whose sum is σ = 927762432. Its totient is φ = 455051520.

The previous prime is 689189749. The next prime is 689189777. The reversal of 689189757 is 757981986.

689189757 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 689189757 - 2³ = 689189749 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 689189757.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689189747) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 288753 + ... + 291129.

It is an arithmetic number, because the mean of its divisors is an integer number (57985152).

Almost surely, 2^689189757 is an apocalyptic number.

It is an amenable number.

689189757 is a deficient number, since it is larger than the sum of its proper divisors (238572675).

689189757 is a wasteful number, since it uses less digits than its factorization.

689189757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3268.

The product of its digits is 7620480, while the sum is 60.

The square root of 689189757 is about 26252.4238309532. The cubic root of 689189757 is about 883.3095747575.

The spelling of 689189757 in words is "six hundred eighty-nine million, one hundred eighty-nine thousand, seven hundred fifty-seven".