423656617 has 4 divisors (see below), whose sum is σ = 426500100. Its totient is φ = 420813136.

The previous prime is 423656593. The next prime is 423656647. The reversal of 423656617 is 716656324.

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 32764176 + 390892441 = 5724^2 + 19771^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423656617 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 a self number, because there is not a number n which added to its sum of digits gives 423656617.

It is not an unprimeable number, because it can be changed into a prime (423656647) 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, 1421518 + ... + 1421815.

It is an arithmetic number, because the mean of its divisors is an integer number (106625025).

Almost surely, 2^423656617 is an apocalyptic number.

It is an amenable number.

423656617 is a deficient number, since it is larger than the sum of its proper divisors (2843483).

423656617 is a wasteful number, since it uses less digits than its factorization.

423656617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2843482.

The product of its digits is 181440, while the sum is 40.

The square root of 423656617 is about 20582.9205167780. The cubic root of 423656617 is about 751.0542903052.

The spelling of 423656617 in words is "four hundred twenty-three million, six hundred fifty-six thousand, six hundred seventeen".