689270229729 has 63 divisors (see below), whose sum is σ = 1047500758857. Its totient is φ = 453341608704.

The previous prime is 689270229719. The next prime is 689270229737. The reversal of 689270229729 is 927922072986.

The square root of 689270229729 is 830223.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 218207634129 + 471062595600 = 467127^2 + 686340^2 .

It is not a de Polignac number, because 689270229729 - 2¹³ = 689270221537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (689270229719) 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 62 ways as a sum of consecutive naturals, for example, 2174353879 + ... + 2174354195.

Almost surely, 2^689270229729 is an apocalyptic number.

689270229729 is the 830223-rd square number.

689270229729 is the 415112-nd centered octagonal number.

It is an amenable number.

689270229729 is a deficient number, since it is larger than the sum of its proper divisors (358230529128).

689270229729 is an frugal number, since it uses more digits than its factorization.

689270229729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 846 (or 417 counting only the distinct ones).

The product of its (nonzero) digits is 27433728, while the sum is 63.

The spelling of 689270229729 in words is "six hundred eighty-nine billion, two hundred seventy million, two hundred twenty-nine thousand, seven hundred twenty-nine".