726380609 has 2 divisors, whose sum is σ = 726380610. Its totient is φ = 726380608.

The previous prime is 726380597. The next prime is 726380647. The reversal of 726380609 is 906083627.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 471020209 + 255360400 = 21703^2 + 15980^2 .

It is a cyclic number.

It is not a de Polignac number, because 726380609 - 2⁴ = 726380593 is a prime.

It is not a weakly prime, because it can be changed into another prime (726380689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363190304 + 363190305.

It is an arithmetic number, because the mean of its divisors is an integer number (363190305).

Almost surely, 2^726380609 is an apocalyptic number.

It is an amenable number.

726380609 is a deficient number, since it is larger than the sum of its proper divisors (1).

726380609 is an equidigital number, since it uses as much as digits as its factorization.

726380609 is an odious number, because the sum of its binary digits is odd.

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

The square root of 726380609 is about 26951.4491076083. The cubic root of 726380609 is about 898.9207676759.

The spelling of 726380609 in words is "seven hundred twenty-six million, three hundred eighty thousand, six hundred nine".