505303901 has 2 divisors, whose sum is σ = 505303902. Its totient is φ = 505303900.

The previous prime is 505303861. The next prime is 505303921. The reversal of 505303901 is 109303505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 394022500 + 111281401 = 19850^2 + 10549^2 .

It is a cyclic number.

It is not a de Polignac number, because 505303901 - 2¹⁰ = 505302877 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505303921) 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 as a sum of consecutive naturals, namely, 252651950 + 252651951.

It is an arithmetic number, because the mean of its divisors is an integer number (252651951).

Almost surely, 2^505303901 is an apocalyptic number.

It is an amenable number.

505303901 is a deficient number, since it is larger than the sum of its proper divisors (1).

505303901 is an equidigital number, since it uses as much as digits as its factorization.

505303901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2025, while the sum is 26.

The square root of 505303901 is about 22478.9657457811. The cubic root of 505303901 is about 796.4971332286.

The spelling of 505303901 in words is "five hundred five million, three hundred three thousand, nine hundred one".