609723 has 12 divisors (see below), whose sum is σ = 905008. Its totient is φ = 395280.

The previous prime is 609709. The next prime is 609743. The reversal of 609723 is 327906.

It is not a de Polignac number, because 609723 - 2¹⁷ = 478651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (609743) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 583 + ... + 1248.

2⁶⁰⁹⁷²³ is an apocalyptic number.

609723 is a deficient number, since it is larger than the sum of its proper divisors (295285).

609723 is a wasteful number, since it uses less digits than its factorization.

609723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1874 (or 1871 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 609723 is about 780.8476163759. The cubic root of 609723 is about 84.7964216925.

The spelling of 609723 in words is "six hundred nine thousand, seven hundred twenty-three".