523128617 has 6 divisors (see below), whose sum is σ = 575009274. Its totient is φ = 475571360.

The previous prime is 523128611. The next prime is 523128647. The reversal of 523128617 is 716821325.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 488365801 + 34762816 = 22099^2 + 5896^2 .

It is not a de Polignac number, because 523128617 - 2⁴ = 523128601 is a prime.

It is a super-3 number, since 3×523128617³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (523128611) 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 5 ways as a sum of consecutive naturals, for example, 2161568 + ... + 2161809.

It is an arithmetic number, because the mean of its divisors is an integer number (95834879).

Almost surely, 2^523128617 is an apocalyptic number.

It is an amenable number.

523128617 is a deficient number, since it is larger than the sum of its proper divisors (51880657).

523128617 is a wasteful number, since it uses less digits than its factorization.

523128617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4323399 (or 4323388 counting only the distinct ones).

The product of its digits is 20160, while the sum is 35.

The square root of 523128617 is about 22872.0050935636. The cubic root of 523128617 is about 805.7546602875.

The spelling of 523128617 in words is "five hundred twenty-three million, one hundred twenty-eight thousand, six hundred seventeen".