505674409 has 2 divisors, whose sum is σ = 505674410. Its totient is φ = 505674408.

The previous prime is 505674397. The next prime is 505674419. The reversal of 505674409 is 904476505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 438483600 + 67190809 = 20940^2 + 8197^2 .

It is a cyclic number.

It is not a de Polignac number, because 505674409 - 2¹⁵ = 505641641 is a prime.

It is not a weakly prime, because it can be changed into another prime (505674419) 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, 252837204 + 252837205.

It is an arithmetic number, because the mean of its divisors is an integer number (252837205).

Almost surely, 2^505674409 is an apocalyptic number.

It is an amenable number.

505674409 is a deficient number, since it is larger than the sum of its proper divisors (1).

505674409 is an equidigital number, since it uses as much as digits as its factorization.

505674409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 151200, while the sum is 40.

The square root of 505674409 is about 22487.2054511004. The cubic root of 505674409 is about 796.6917596441.

The spelling of 505674409 in words is "five hundred five million, six hundred seventy-four thousand, four hundred nine".