505344641 has 2 divisors, whose sum is σ = 505344642. Its totient is φ = 505344640.

The previous prime is 505344589. The next prime is 505344649. The reversal of 505344641 is 146443505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 471063616 + 34281025 = 21704^2 + 5855^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505344641 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_26622059 and since 505344641 and 26622059 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 505344598 and 505344607.

It is not a weakly prime, because it can be changed into another prime (505344649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252672320 + 252672321.

It is an arithmetic number, because the mean of its divisors is an integer number (252672321).

Almost surely, 2^505344641 is an apocalyptic number.

It is an amenable number.

505344641 is a deficient number, since it is larger than the sum of its proper divisors (1).

505344641 is an equidigital number, since it uses as much as digits as its factorization.

505344641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 505344641 is about 22479.8719079981. The cubic root of 505344641 is about 796.5185384471.

It can be divided in two parts, 5053 and 44641, that added together give a palindrome (49694).

The spelling of 505344641 in words is "five hundred five million, three hundred forty-four thousand, six hundred forty-one".