726266921 has 2 divisors, whose sum is σ = 726266922. Its totient is φ = 726266920.

The previous prime is 726266917. The next prime is 726266927. The reversal of 726266921 is 129662627.

726266921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 421275625 + 304991296 = 20525^2 + 17464^2 .

It is a cyclic number.

It is not a de Polignac number, because 726266921 - 2² = 726266917 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (726266927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363133460 + 363133461.

It is an arithmetic number, because the mean of its divisors is an integer number (363133461).

Almost surely, 2^726266921 is an apocalyptic number.

It is an amenable number.

726266921 is a deficient number, since it is larger than the sum of its proper divisors (1).

726266921 is an equidigital number, since it uses as much as digits as its factorization.

726266921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 41.

The square root of 726266921 is about 26949.3398991515. The cubic root of 726266921 is about 898.8738676371.

The spelling of 726266921 in words is "seven hundred twenty-six million, two hundred sixty-six thousand, nine hundred twenty-one".