423570865 has 4 divisors (see below), whose sum is σ = 508285044. Its totient is φ = 338856688.

The previous prime is 423570863. The next prime is 423570869. The reversal of 423570865 is 568075324.

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 204175521 + 219395344 = 14289^2 + 14812^2 .

It is a cyclic number.

It is not a de Polignac number, because 423570865 - 2¹ = 423570863 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423570863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42357082 + ... + 42357091.

It is an arithmetic number, because the mean of its divisors is an integer number (127071261).

Almost surely, 2^423570865 is an apocalyptic number.

It is an amenable number.

423570865 is a deficient number, since it is larger than the sum of its proper divisors (84714179).

423570865 is an equidigital number, since it uses as much as digits as its factorization.

423570865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84714178.

The product of its (nonzero) digits is 201600, while the sum is 40.

The square root of 423570865 is about 20580.8373250458. The cubic root of 423570865 is about 751.0036134514.

The spelling of 423570865 in words is "four hundred twenty-three million, five hundred seventy thousand, eight hundred sixty-five".