505078081 has 2 divisors, whose sum is σ = 505078082. Its totient is φ = 505078080.

The previous prime is 505078003. The next prime is 505078097. The reversal of 505078081 is 180870505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 480486400 + 24591681 = 21920^2 + 4959^2 .

It is a cyclic number.

It is not a de Polignac number, because 505078081 - 2²⁷ = 370860353 is a prime.

It is a super-2 number, since 2×505078081² = 510207735813285122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (505078481) 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, 252539040 + 252539041.

It is an arithmetic number, because the mean of its divisors is an integer number (252539041).

Almost surely, 2^505078081 is an apocalyptic number.

It is an amenable number.

505078081 is a deficient number, since it is larger than the sum of its proper divisors (1).

505078081 is an equidigital number, since it uses as much as digits as its factorization.

505078081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11200, while the sum is 34.

The square root of 505078081 is about 22473.9422665450. The cubic root of 505078081 is about 796.3784641909.

The spelling of 505078081 in words is "five hundred five million, seventy-eight thousand, eighty-one".