729001001 has 4 divisors (see below), whose sum is σ = 729055104. Its totient is φ = 728946900.

The previous prime is 729000997. The next prime is 729001069. The reversal of 729001001 is 100100927.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 729001001 - 2² = 729000997 is a prime.

It is a Duffinian number.

729001001 is a modest number, since divided by 1001 gives 729 as remainder.

It is not an unprimeable number, because it can be changed into a prime (729007001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11036 + ... + 39746.

It is an arithmetic number, because the mean of its divisors is an integer number (182263776).

Almost surely, 2^729001001 is an apocalyptic number.

It is an amenable number.

729001001 is a deficient number, since it is larger than the sum of its proper divisors (54103).

729001001 is a wasteful number, since it uses less digits than its factorization.

729001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54102.

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 729001001 is about 27000.0185370307. The cubic root of 729001001 is about 900.0004119340. Note that the first 3 decimals are identical.

Adding to 729001001 its reverse (100100927), we get a palindrome (829101928).

The spelling of 729001001 in words is "seven hundred twenty-nine million, one thousand, one".