744409 has 2 divisors, whose sum is σ = 744410. Its totient is φ = 744408.

The previous prime is 744407. The next prime is 744431. The reversal of 744409 is 904447.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 705600 + 38809 = 840^2 + 197^2 .

It is a cyclic number.

It is not a de Polignac number, because 744409 - 2¹ = 744407 is a prime.

Together with 744407, it forms a pair of twin primes.

It is a Chen prime.

It is a nialpdrome in base 15.

It is not a weakly prime, because it can be changed into another prime (744407) 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, 372204 + 372205.

It is an arithmetic number, because the mean of its divisors is an integer number (372205).

2⁷⁴⁴⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

744409 is a deficient number, since it is larger than the sum of its proper divisors (1).

744409 is an equidigital number, since it uses as much as digits as its factorization.

744409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 744409 is about 862.7914000499. The cubic root of 744409 is about 90.6296991618.

The spelling of 744409 in words is "seven hundred forty-four thousand, four hundred nine".