726125509 has 2 divisors, whose sum is σ = 726125510. Its totient is φ = 726125508.

The previous prime is 726125501. The next prime is 726125531. The reversal of 726125509 is 905521627.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 533748609 + 192376900 = 23103^2 + 13870^2 .

It is a cyclic number.

It is not a de Polignac number, because 726125509 - 2³ = 726125501 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (726125501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363062754 + 363062755.

It is an arithmetic number, because the mean of its divisors is an integer number (363062755).

Almost surely, 2^726125509 is an apocalyptic number.

It is an amenable number.

726125509 is a deficient number, since it is larger than the sum of its proper divisors (1).

726125509 is an equidigital number, since it uses as much as digits as its factorization.

726125509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 726125509 is about 26946.7161079045. The cubic root of 726125509 is about 898.8155237057.

The spelling of 726125509 in words is "seven hundred twenty-six million, one hundred twenty-five thousand, five hundred nine".