505432549 has 2 divisors, whose sum is σ = 505432550. Its totient is φ = 505432548.

The previous prime is 505432537. The next prime is 505432573. The reversal of 505432549 is 945234505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 292068100 + 213364449 = 17090^2 + 14607^2 .

It is a cyclic number.

It is not a de Polignac number, because 505432549 - 2⁵ = 505432517 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505432579) 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, 252716274 + 252716275.

It is an arithmetic number, because the mean of its divisors is an integer number (252716275).

Almost surely, 2^505432549 is an apocalyptic number.

It is an amenable number.

505432549 is a deficient number, since it is larger than the sum of its proper divisors (1).

505432549 is an equidigital number, since it uses as much as digits as its factorization.

505432549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108000, while the sum is 37.

The square root of 505432549 is about 22481.8270832244. The cubic root of 505432549 is about 796.5647223028.

The spelling of 505432549 in words is "five hundred five million, four hundred thirty-two thousand, five hundred forty-nine".