423502405 has 4 divisors (see below), whose sum is σ = 508202892. Its totient is φ = 338801920.

The previous prime is 423502403. The next prime is 423502411. The reversal of 423502405 is 504205324.

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 219069601 + 204432804 = 14801^2 + 14298^2 .

It is not a de Polignac number, because 423502405 - 2¹ = 423502403 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 423502405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423502403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42350236 + ... + 42350245.

It is an arithmetic number, because the mean of its divisors is an integer number (127050723).

Almost surely, 2^423502405 is an apocalyptic number.

It is an amenable number.

423502405 is a deficient number, since it is larger than the sum of its proper divisors (84700487).

423502405 is an equidigital number, since it uses as much as digits as its factorization.

423502405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84700486.

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 423502405 is about 20579.1740601998. The cubic root of 423502405 is about 750.9631507396.

Adding to 423502405 its reverse (504205324), we get a palindrome (927707729).

The spelling of 423502405 in words is "four hundred twenty-three million, five hundred two thousand, four hundred five".