505301323409 has 2 divisors, whose sum is σ = 505301323410. Its totient is φ = 505301323408.

The previous prime is 505301323283. The next prime is 505301323459. The reversal of 505301323409 is 904323103505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 329108742400 + 176192581009 = 573680^2 + 419753^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505301323409 is a prime.

It is a super-2 number, since 2×505301323409² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (505301323459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252650661704 + 252650661705.

It is an arithmetic number, because the mean of its divisors is an integer number (252650661705).

Almost surely, 2^505301323409 is an apocalyptic number.

It is an amenable number.

505301323409 is a deficient number, since it is larger than the sum of its proper divisors (1).

505301323409 is an equidigital number, since it uses as much as digits as its factorization.

505301323409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48600, while the sum is 35.

The spelling of 505301323409 in words is "five hundred five billion, three hundred one million, three hundred twenty-three thousand, four hundred nine".