423729 has 18 divisors (see below), whose sum is σ = 647010. Its totient is φ = 267168.

The previous prime is 423727. The next prime is 423749. The reversal of 423729 is 927324.

It can be written as a sum of positive squares in only one way, i.e., 304704 + 119025 = 552^2 + 345^2 .

It is not a de Polignac number, because 423729 - 2¹ = 423727 is a prime.

It is not an unprimeable number, because it can be changed into a prime (423727) 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 17 ways as a sum of consecutive naturals, for example, 4717 + ... + 4805.

It is an arithmetic number, because the mean of its divisors is an integer number (35945).

2⁴²³⁷²⁹ is an apocalyptic number.

It is an amenable number.

423729 is a deficient number, since it is larger than the sum of its proper divisors (223281).

423729 is a wasteful number, since it uses less digits than its factorization.

423729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141 (or 115 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 423729 is about 650.9446981119. The cubic root of 423729 is about 75.1097061160.

The spelling of 423729 in words is "four hundred twenty-three thousand, seven hundred twenty-nine".