505431413 has 2 divisors, whose sum is σ = 505431414. Its totient is φ = 505431412.

The previous prime is 505431397. The next prime is 505431427. The reversal of 505431413 is 314134505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 270207844 + 235223569 = 16438^2 + 15337^2 .

It is a cyclic number.

It is not a de Polignac number, because 505431413 - 2⁴ = 505431397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505431473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252715706 + 252715707.

It is an arithmetic number, because the mean of its divisors is an integer number (252715707).

Almost surely, 2^505431413 is an apocalyptic number.

It is an amenable number.

505431413 is a deficient number, since it is larger than the sum of its proper divisors (1).

505431413 is an equidigital number, since it uses as much as digits as its factorization.

505431413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 505431413 is about 22481.8018183597. The cubic root of 505431413 is about 796.5641255214.

Adding to 505431413 its reverse (314134505), we get a palindrome (819565918).

The spelling of 505431413 in words is "five hundred five million, four hundred thirty-one thousand, four hundred thirteen".