530128961 has 4 divisors (see below), whose sum is σ = 548409300. Its totient is φ = 511848624.

The previous prime is 530128889. The next prime is 530128967. The reversal of 530128961 is 169821035.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 169821035 = 5 ⋅33964207.

It can be written as a sum of positive squares in 2 ways, for example, as 118810000 + 411318961 = 10900^2 + 20281^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-530128961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (530128967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9140126 + ... + 9140183.

It is an arithmetic number, because the mean of its divisors is an integer number (137102325).

Almost surely, 2^530128961 is an apocalyptic number.

It is an amenable number.

530128961 is a deficient number, since it is larger than the sum of its proper divisors (18280339).

530128961 is a wasteful number, since it uses less digits than its factorization.

530128961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18280338.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 530128961 is about 23024.5295500256. The cubic root of 530128961 is about 809.3328658140.

Adding to 530128961 its reverse (169821035), we get a palindrome (699949996).

The spelling of 530128961 in words is "five hundred thirty million, one hundred twenty-eight thousand, nine hundred sixty-one".