755609 has 4 divisors (see below), whose sum is σ = 758580. Its totient is φ = 752640.

The previous prime is 755597. The next prime is 755617. The reversal of 755609 is 906557.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 225625 + 529984 = 475^2 + 728^2 .

It is a cyclic number.

It is not a de Polignac number, because 755609 - 2⁴ = 755593 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 755609.

It is not an unprimeable number, because it can be changed into a prime (755009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1064 + ... + 1625.

It is an arithmetic number, because the mean of its divisors is an integer number (189645).

2⁷⁵⁵⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

755609 is a deficient number, since it is larger than the sum of its proper divisors (2971).

755609 is a wasteful number, since it uses less digits than its factorization.

755609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2970.

The product of its (nonzero) digits is 9450, while the sum is 32.

The square root of 755609 is about 869.2577293300. The cubic root of 755609 is about 91.0819613383.

The spelling of 755609 in words is "seven hundred fifty-five thousand, six hundred nine".