738609 has 4 divisors (see below), whose sum is σ = 984816. Its totient is φ = 492404.

The previous prime is 738589. The next prime is 738623. The reversal of 738609 is 906837.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 906837 = 3 ⋅302279.

It is a cyclic number.

It is not a de Polignac number, because 738609 - 2¹⁵ = 705841 is a prime.

It is a D-number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 738609.

It is not an unprimeable number, because it can be changed into a prime (738109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123099 + ... + 123104.

It is an arithmetic number, because the mean of its divisors is an integer number (246204).

2⁷³⁸⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

738609 is a deficient number, since it is larger than the sum of its proper divisors (246207).

738609 is a wasteful number, since it uses less digits than its factorization.

738609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246206.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 738609 is about 859.4236440778. The cubic root of 738609 is about 90.3937073047.

The spelling of 738609 in words is "seven hundred thirty-eight thousand, six hundred nine".