423508529 has 4 divisors (see below), whose sum is σ = 424005876. Its totient is φ = 423011184.

The previous prime is 423508507. The next prime is 423508559. The reversal of 423508529 is 925805324.

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 36481600 + 387026929 = 6040^2 + 19673^2 .

It is a cyclic number.

It is not a de Polignac number, because 423508529 - 2¹⁶ = 423442993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 423508492 and 423508501.

It is not an unprimeable number, because it can be changed into a prime (423508559) 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, 247394 + ... + 249099.

It is an arithmetic number, because the mean of its divisors is an integer number (106001469).

Almost surely, 2^423508529 is an apocalyptic number.

It is an amenable number.

423508529 is a deficient number, since it is larger than the sum of its proper divisors (497347).

423508529 is an equidigital number, since it uses as much as digits as its factorization.

423508529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497346.

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 423508529 is about 20579.3228508617. The cubic root of 423508529 is about 750.9667704562.

The spelling of 423508529 in words is "four hundred twenty-three million, five hundred eight thousand, five hundred twenty-nine".