689909759 has 72 divisors (see below), whose sum is σ = 960905088. Its totient is φ = 489404160.

The previous prime is 689909749. The next prime is 689909761. The reversal of 689909759 is 957909986.

It is not a de Polignac number, because 689909759 - 2²⁰ = 688861183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689909729) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 6698102 + ... + 6698204.

It is an arithmetic number, because the mean of its divisors is an integer number (13345904).

Almost surely, 2^689909759 is an apocalyptic number.

689909759 is a deficient number, since it is larger than the sum of its proper divisors (270995329).

689909759 is a wasteful number, since it uses less digits than its factorization.

689909759 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205 (or 181 counting only the distinct ones).

The product of its (nonzero) digits is 11022480, while the sum is 62.

The square root of 689909759 is about 26266.1333088828. The cubic root of 689909759 is about 883.6170678728.

The spelling of 689909759 in words is "six hundred eighty-nine million, nine hundred nine thousand, seven hundred fifty-nine".