729702169 has 27 divisors (see below), whose sum is σ = 905695743. Its totient is φ = 586074048.

The previous prime is 729702167. The next prime is 729702173. The reversal of 729702169 is 961207927.

The square root of 729702169 is 27013.

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

It can be written as a sum of positive squares in only one way, i.e., 568107225 + 161594944 = 23835^2 + 12712^2 .

It is not a de Polignac number, because 729702169 - 2¹ = 729702167 is a prime.

It is a super-2 number, since 2×729702169² = 1064930510886609122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (729702167) 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 26 ways as a sum of consecutive naturals, for example, 3214434 + ... + 3214660.

Almost surely, 2^729702169 is an apocalyptic number.

729702169 is the 27013-rd square number.

729702169 is the 13507-th centered octagonal number.

It is an amenable number.

729702169 is a deficient number, since it is larger than the sum of its proper divisors (175993574).

729702169 is an equidigital number, since it uses as much as digits as its factorization.

729702169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 95256, while the sum is 43.

The cubic root of 729702169 is about 900.2888657114.

The spelling of 729702169 in words is "seven hundred twenty-nine million, seven hundred two thousand, one hundred sixty-nine".