505450013 has 4 divisors (see below), whose sum is σ = 506104668. Its totient is φ = 504795360.

The previous prime is 505450003. The next prime is 505450031. The reversal of 505450013 is 310054505.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 64995844 + 440454169 = 8062^2 + 20987^2 .

It is a cyclic number.

It is not a de Polignac number, because 505450013 - 2⁶ = 505449949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505450003) 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 in 3 ways as a sum of consecutive naturals, for example, 326168 + ... + 327713.

It is an arithmetic number, because the mean of its divisors is an integer number (126526167).

Almost surely, 2^505450013 is an apocalyptic number.

It is an amenable number.

505450013 is a deficient number, since it is larger than the sum of its proper divisors (654655).

505450013 is an equidigital number, since it uses as much as digits as its factorization.

505450013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654654.

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 505450013 is about 22482.2154824652. The cubic root of 505450013 is about 796.5738966533.

The spelling of 505450013 in words is "five hundred five million, four hundred fifty thousand, thirteen".