726725789 has 2 divisors, whose sum is σ = 726725790. Its totient is φ = 726725788.

The previous prime is 726725749. The next prime is 726725801. The reversal of 726725789 is 987527627.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 472323289 + 254402500 = 21733^2 + 15950^2 .

It is a cyclic number.

It is not a de Polignac number, because 726725789 - 2²⁰ = 725677213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 726725789.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (726725719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363362894 + 363362895.

It is an arithmetic number, because the mean of its divisors is an integer number (363362895).

Almost surely, 2^726725789 is an apocalyptic number.

It is an amenable number.

726725789 is a deficient number, since it is larger than the sum of its proper divisors (1).

726725789 is an equidigital number, since it uses as much as digits as its factorization.

726725789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2963520, while the sum is 53.

The square root of 726725789 is about 26957.8520843186. The cubic root of 726725789 is about 899.0631357996.

The spelling of 726725789 in words is "seven hundred twenty-six million, seven hundred twenty-five thousand, seven hundred eighty-nine".