727409 has 2 divisors, whose sum is σ = 727410. Its totient is φ = 727408.

The previous prime is 727399. The next prime is 727427. The reversal of 727409 is 904727.

727409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 717409 + 10000 = 847^2 + 100^2 .

It is an emirp because it is prime and its reverse (904727) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 727409 - 2¹⁶ = 661873 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (727459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363704 + 363705.

It is an arithmetic number, because the mean of its divisors is an integer number (363705).

2⁷²⁷⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

727409 is a deficient number, since it is larger than the sum of its proper divisors (1).

727409 is an equidigital number, since it uses as much as digits as its factorization.

727409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 727409 is about 852.8827586486. The cubic root of 727409 is about 89.9344790606.

The spelling of 727409 in words is "seven hundred twenty-seven thousand, four hundred nine".