726289 has 2 divisors, whose sum is σ = 726290. Its totient is φ = 726288.

The previous prime is 726287. The next prime is 726301. The reversal of 726289 is 982627.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 693889 + 32400 = 833^2 + 180^2 .

It is a cyclic number.

It is not a de Polignac number, because 726289 - 2¹ = 726287 is a prime.

Together with 726287, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (726287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363144 + 363145.

It is an arithmetic number, because the mean of its divisors is an integer number (363145).

2⁷²⁶²⁸⁹ is an apocalyptic number.

It is an amenable number.

726289 is a deficient number, since it is larger than the sum of its proper divisors (1).

726289 is an equidigital number, since it uses as much as digits as its factorization.

726289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 34.

The square root of 726289 is about 852.2259090171. The cubic root of 726289 is about 89.8882976334. Note that the first 3 decimals are identical.

The spelling of 726289 in words is "seven hundred twenty-six thousand, two hundred eighty-nine".