726327289 has 2 divisors, whose sum is σ = 726327290. Its totient is φ = 726327288.

The previous prime is 726327247. The next prime is 726327293. The reversal of 726327289 is 982723627.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 720117225 + 6210064 = 26835^2 + 2492^2 .

It is an emirp because it is prime and its reverse (982723627) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 726327289 - 2¹⁵ = 726294521 is a prime.

It is not a weakly prime, because it can be changed into another prime (726327299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363163644 + 363163645.

It is an arithmetic number, because the mean of its divisors is an integer number (363163645).

Almost surely, 2^726327289 is an apocalyptic number.

It is an amenable number.

726327289 is a deficient number, since it is larger than the sum of its proper divisors (1).

726327289 is an equidigital number, since it uses as much as digits as its factorization.

726327289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 46.

The square root of 726327289 is about 26950.4599033115. The cubic root of 726327289 is about 898.8987720318.

The spelling of 726327289 in words is "seven hundred twenty-six million, three hundred twenty-seven thousand, two hundred eighty-nine".