689971530 has 32 divisors (see below), whose sum is σ = 1675888704. Its totient is φ = 181774976.

The previous prime is 689971519. The next prime is 689971531. The reversal of 689971530 is 35179986.

It is a self number, because there is not a number n which added to its sum of digits gives 689971530.

It is not an unprimeable number, because it can be changed into a prime (689971531) 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, 136059 + ... + 141038.

It is an arithmetic number, because the mean of its divisors is an integer number (52371522).

Almost surely, 2^689971530 is an apocalyptic number.

689971530 is an abundant number, since it is smaller than the sum of its proper divisors (985917174).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

689971530 is a wasteful number, since it uses less digits than its factorization.

689971530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277190.

The product of its (nonzero) digits is 408240, while the sum is 48.

The square root of 689971530 is about 26267.3091503488. The cubic root of 689971530 is about 883.6434386072.

The spelling of 689971530 in words is "six hundred eighty-nine million, nine hundred seventy-one thousand, five hundred thirty".