729486081 has 15 divisors (see below), whose sum is σ = 1090089363. Its totient is φ = 486162000.

The previous prime is 729486073. The next prime is 729486119. The reversal of 729486081 is 180684927.

The square root of 729486081 is 27009.

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., 392396481 + 337089600 = 19809^2 + 18360^2 .

It is not a de Polignac number, because 729486081 - 2³ = 729486073 is a prime.

It is a super-2 number, since 2×729486081² = 1064299884745477122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (729486071) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 241581 + ... + 244581.

Almost surely, 2^729486081 is an apocalyptic number.

729486081 is the 27009-th square number.

729486081 is the 13505-th centered octagonal number.

It is an amenable number.

729486081 is a deficient number, since it is larger than the sum of its proper divisors (360603282).

729486081 is an frugal number, since it uses more digits than its factorization.

729486081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6014 (or 3004 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The cubic root of 729486081 is about 900.1999888905.

The spelling of 729486081 in words is "seven hundred twenty-nine million, four hundred eighty-six thousand, eighty-one".