423600445 has 4 divisors (see below), whose sum is σ = 508320540. Its totient is φ = 338880352.

The previous prime is 423600431. The next prime is 423600473. The reversal of 423600445 is 544006324.

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 328225689 + 95374756 = 18117^2 + 9766^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423600445 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 42360040 + ... + 42360049.

It is an arithmetic number, because the mean of its divisors is an integer number (127080135).

Almost surely, 2^423600445 is an apocalyptic number.

It is an amenable number.

423600445 is a deficient number, since it is larger than the sum of its proper divisors (84720095).

423600445 is an equidigital number, since it uses as much as digits as its factorization.

423600445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84720094.

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 423600445 is about 20581.5559421536. Note that the first 3 decimals coincide. The cubic root of 423600445 is about 751.0210951147.

Adding to 423600445 its reverse (544006324), we get a palindrome (967606769).

The spelling of 423600445 in words is "four hundred twenty-three million, six hundred thousand, four hundred forty-five".