530724661 has 4 divisors (see below), whose sum is σ = 530944524. Its totient is φ = 530504800.

The previous prime is 530724653. The next prime is 530724749. The reversal of 530724661 is 166427035.

It is a happy number.

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 269288100 + 261436561 = 16410^2 + 16169^2 .

It is a cyclic number.

It is not a de Polignac number, because 530724661 - 2³ = 530724653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (530724641) 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, 106270 + ... + 111151.

It is an arithmetic number, because the mean of its divisors is an integer number (132736131).

Almost surely, 2^530724661 is an apocalyptic number.

It is an amenable number.

530724661 is a deficient number, since it is larger than the sum of its proper divisors (219863).

530724661 is a wasteful number, since it uses less digits than its factorization.

530724661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219862.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 530724661 is about 23037.4621215098. The cubic root of 530724661 is about 809.6358984420.

The spelling of 530724661 in words is "five hundred thirty million, seven hundred twenty-four thousand, six hundred sixty-one".