530985661 has 2 divisors, whose sum is σ = 530985662. Its totient is φ = 530985660.

The previous prime is 530985643. The next prime is 530985673. The reversal of 530985661 is 166589035.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 470239225 + 60746436 = 21685^2 + 7794^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-530985661 is a prime.

It is equal to p_27899701 and since 530985661 and 27899701 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (530965661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265492830 + 265492831.

It is an arithmetic number, because the mean of its divisors is an integer number (265492831).

Almost surely, 2^530985661 is an apocalyptic number.

It is an amenable number.

530985661 is a deficient number, since it is larger than the sum of its proper divisors (1).

530985661 is an equidigital number, since it uses as much as digits as its factorization.

530985661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 194400, while the sum is 43.

The square root of 530985661 is about 23043.1261117063. The cubic root of 530985661 is about 809.7685977204.

The spelling of 530985661 in words is "five hundred thirty million, nine hundred eighty-five thousand, six hundred sixty-one".