505606501 has 2 divisors, whose sum is σ = 505606502. Its totient is φ = 505606500.

The previous prime is 505606487. The next prime is 505606567. The reversal of 505606501 is 105606505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 486158401 + 19448100 = 22049^2 + 4410^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505606501 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 505606501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505606601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252803250 + 252803251.

It is an arithmetic number, because the mean of its divisors is an integer number (252803251).

Almost surely, 2^505606501 is an apocalyptic number.

It is an amenable number.

505606501 is a deficient number, since it is larger than the sum of its proper divisors (1).

505606501 is an equidigital number, since it uses as much as digits as its factorization.

505606501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 505606501 is about 22485.6954751237. The cubic root of 505606501 is about 796.6560949522.

The spelling of 505606501 in words is "five hundred five million, six hundred six thousand, five hundred one".