726021011 has 4 divisors (see below), whose sum is σ = 726369000. Its totient is φ = 725673024.

The previous prime is 726020929. The next prime is 726021017. The reversal of 726021011 is 110120627.

726021011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 726021011 - 2¹⁴ = 726004627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (726021017) 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, 170846 + ... + 175043.

It is an arithmetic number, because the mean of its divisors is an integer number (181592250).

Almost surely, 2^726021011 is an apocalyptic number.

726021011 is a deficient number, since it is larger than the sum of its proper divisors (347989).

726021011 is a wasteful number, since it uses less digits than its factorization.

726021011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347988.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 726021011 is about 26944.7770634682. Note that the first 3 decimals coincide. The cubic root of 726021011 is about 898.7724049292.

Adding to 726021011 its reverse (110120627), we get a palindrome (836141638).

The spelling of 726021011 in words is "seven hundred twenty-six million, twenty-one thousand, eleven".