506359661 has 2 divisors, whose sum is σ = 506359662. Its totient is φ = 506359660.

The previous prime is 506359649. The next prime is 506359681. The reversal of 506359661 is 166953605.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 475501636 + 30858025 = 21806^2 + 5555^2 .

It is a cyclic number.

It is not a de Polignac number, because 506359661 - 2¹⁸ = 506097517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (506359681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 253179830 + 253179831.

It is an arithmetic number, because the mean of its divisors is an integer number (253179831).

Almost surely, 2^506359661 is an apocalyptic number.

It is an amenable number.

506359661 is a deficient number, since it is larger than the sum of its proper divisors (1).

506359661 is an equidigital number, since it uses as much as digits as its factorization.

506359661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145800, while the sum is 41.

The square root of 506359661 is about 22502.4367791579. The cubic root of 506359661 is about 797.0514694984.

The spelling of 506359661 in words is "five hundred six million, three hundred fifty-nine thousand, six hundred sixty-one".