729112001 has 4 divisors (see below), whose sum is σ = 732137604. Its totient is φ = 726086400.

The previous prime is 729111991. The next prime is 729112003. The reversal of 729112001 is 100211927.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 585591601 + 143520400 = 24199^2 + 11980^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-729112001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (729112003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1512440 + ... + 1512921.

It is an arithmetic number, because the mean of its divisors is an integer number (183034401).

Almost surely, 2^729112001 is an apocalyptic number.

It is an amenable number.

729112001 is a deficient number, since it is larger than the sum of its proper divisors (3025603).

729112001 is a wasteful number, since it uses less digits than its factorization.

729112001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3025602.

The product of its (nonzero) digits is 252, while the sum is 23.

The square root of 729112001 is about 27002.0740129346. The cubic root of 729112001 is about 900.0460885863.

Adding to 729112001 its reverse (100211927), we get a palindrome (829323928).

The spelling of 729112001 in words is "seven hundred twenty-nine million, one hundred twelve thousand, one".