726109121 has 2 divisors, whose sum is σ = 726109122. Its totient is φ = 726109120.

The previous prime is 726109093. The next prime is 726109147. The reversal of 726109121 is 121901627.

726109121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 580569025 + 145540096 = 24095^2 + 12064^2 .

It is an emirp because it is prime and its reverse (121901627) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-726109121 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (726109421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363054560 + 363054561.

It is an arithmetic number, because the mean of its divisors is an integer number (363054561).

Almost surely, 2^726109121 is an apocalyptic number.

It is an amenable number.

726109121 is a deficient number, since it is larger than the sum of its proper divisors (1).

726109121 is an equidigital number, since it uses as much as digits as its factorization.

726109121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 726109121 is about 26946.4120246091. The cubic root of 726109121 is about 898.8087618353.

The spelling of 726109121 in words is "seven hundred twenty-six million, one hundred nine thousand, one hundred twenty-one".