505135613 has 2 divisors, whose sum is σ = 505135614. Its totient is φ = 505135612.

The previous prime is 505135597. The next prime is 505135661. The reversal of 505135613 is 316531505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 438190489 + 66945124 = 20933^2 + 8182^2 .

It is a cyclic number.

It is not a de Polignac number, because 505135613 - 2⁴ = 505135597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505105613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252567806 + 252567807.

It is an arithmetic number, because the mean of its divisors is an integer number (252567807).

Almost surely, 2^505135613 is an apocalyptic number.

It is an amenable number.

505135613 is a deficient number, since it is larger than the sum of its proper divisors (1).

505135613 is an equidigital number, since it uses as much as digits as its factorization.

505135613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6750, while the sum is 29.

The square root of 505135613 is about 22475.2222013488. Note that the first 4 decimals coincide. The cubic root of 505135613 is about 796.4087007741.

The spelling of 505135613 in words is "five hundred five million, one hundred thirty-five thousand, six hundred thirteen".